QNAP TVS-h 74t Series User Manual Download Page 34

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Expansion Unit

Model

Description

Required Accessories

TL-R1200S-RP

• Uses a SATA 6 Gbps (SFF-8088)

interface

• Supports SATA HDD/SSD

• 3 x SFF-8088 to SFF-8644 connector

cables

• QXP-1600eS-A1164 host bus adapter

• RAIL-B02

Connecting SATA JBOD expansion units

To connect the TVS-hx74T to SATA JBOD expansion units, a host bus adapter must be installed on the NAS.

For required accessories details, see

Expansion unit installation

1. Power off the NAS.

2. Install a host bus adapter on the PCIe slot.

For details, see

Installing expansion cards

Important

The QNAP QXP host bus adapter is required for connecting the SATA JBOD enclosure to a host

device. Third-party host bus adapters are not compatible with QNAP JBOD enclosures.

3. Connect the expansion units to the NAS.

Note

This image shows connecting the TVS-h874T to the TL-R400S JBOD enclosures.

4. Power on the SATA JBOD expansion units.

5. Power on the NAS.

TVS-hx74T User Guide

Installation and Configuration

Summary of Contents for TVS-h 74t Series

Page 1: ...TVS hx74T TVS h674T TVS h874T User Guide Document Version 2 14 09 2023 ...

Page 2: ...ing QuTS hero using Qfinder Pro 35 Initializing QuTS hero using the cloud installation website 37 4 Basic Operations Power button 40 Reset button 40 USB One Touch Copy button 41 LCD panel 41 Viewing TCP IP settings 41 Configuring TCP IP settings 41 Viewing drive information 42 Viewing shared folder information 43 Viewing system information 43 Powering off the NAS 43 Restarting the NAS 43 Changing ...

Page 3: ...ailed drives 57 Recovering unintentionally removed healthy drives 58 Support and other resources 58 7 Glossary Cloud Key 59 myQNAPcloud 59 myQNAPcloud Link 59 Qfinder Pro 59 QTS 59 QuTS hero 59 8 Notices Limited warranty 60 Disclaimer 60 Copyright and trademarks 60 GNU General Public License 61 CE notice 68 UKCA notice 68 FCC notice 68 VCCI notice 69 BSMI notice 69 SJ T 11364 2006 70 2 ...

Page 4: ...ns The device should be stored in a secure location with restricted access controlled through the use of a tool lock and key or any means of security Only qualified skilled and authorized persons with knowledge of all restrictions safety precautions and installation and maintenance procedures should have physical access to the device To avoid potential injury or damage to components ensure that th...

Page 5: ...o local regulations or the instructions of the battery manufacturer Moving Parts Moving fan blades Keep your body parts away from moving fan blades while the device is connected to a power source Moving components Keep your body parts away from other moving components The device is not suitable for use in locations where children are likely to be present TVS hx74T User Guide Important Information ...

Page 6: ...B Component TVS h674T TVS h874T TVS h674T i5 32G TVS h874T i7 32G TVS h874T i9 64G Processor CPU Intel Core i5 12400 Intel Core i7 Intel Core i9 Frequency 6 core 12 thread 4 4 GHz burst 12 core 8P 4E 20 thread 4 9 GHz burst 16 core 8P 8E 24 thread 5 1 GHz burst Architecture x86 64 bit Encryption engine AES NI Graphics Intel UHD Graphics 730 Intel UHD Graphics 770 Intel UHD Graphics 770 Memory Pre ...

Page 7: ...SD cache acceleration for all drives Hot swapping The device supports hot swapping drives except for the following M 2 SSDs Network 2 5 Gigabit network interface 2 x 2 5 GbE RJ45 Note These ports provide 2 5 Gbps 1 Gbps 100 Mbps and 10 Mbps network connection speeds External I O Ports Expansion Slots PCIe slots Slot 1 PCIe Gen 4 x16 Slot 2 PCIe Gen 4 x4 Tip For the list of compatible drive models ...

Page 8: ...nsure that you replace the existing battery with a battery of the same type Important Dispose of used batteries according to local regulations or the instructions of the battery manufacturer Fans System 2 x 92 mm 12V DC fans CPU 1 x 60 mm 12V DC fan System 2 x 120 mm 12V DC fans CPU 1 x 60 mm 12V DC fan System 2 x 120 mm 12V DC fans CPU 1 x 60 mm 12V DC fan Operating temperature 0 C to 40 C 32 F t...

Page 9: ...tem Quantity Drive tray keys 2 Quick Installation Guide QIG 1 Components Front panel TVS h674T TVS h874T No Component No Component 1 Status LED 7 LCD select button TVS hx74T User Guide Product Overview 8 ...

Page 10: ...nt 2 LAN LED 8 Drive LEDs 3 USB LED 9 Power button 4 M 2 SSD LEDs 10 USB One Touch Copy button 5 LCD panel 11 USB 3 2 Gen 2 Type A port 6 LCD enter button Rear panel TVS h674T TVS h874T TVS hx74T User Guide Product Overview 9 ...

Page 11: ...is slot is preinstalled with a Thunderbolt 4 AIC expansion card 9 2 5 Gigabit Ethernet activity LED 4 HDMI port 10 Kensington security slot 5 2 5 Gigabit Ethernet ports RJ45 11 Power input 6 USB 3 2 Gen 2 Type A port Right panel No Component No Component 1 Memory slot 2 3 M 2 SSD slot 1 2 Memory slot 1 4 M 2 SSD slot 2 TVS hx74T User Guide Product Overview 10 ...

Page 12: ... Component No Component 1 PCIe slot 1 PCIe 4 0 x16 2 PCIe slot 2 PCIe 4 0 x4 Note This slot is preinstalled with a Thunderbolt 4 AIC expansion card Drive numbering TVS h674T TVS hx74T User Guide Product Overview 11 ...

Page 13: ...rives For the list of compatible drive models go to https www qnap com compatibility Network cable Qfinder Pro installer Computer Tools Phillips 1 or 2 screwdriver Anti static wrist strap Setting up the NAS Important Read all safety requirements and information carefully before setting up the NAS or installing NAS components 1 Place your NAS device in an environment that meets the requirements For...

Page 14: ...ails see Replacing memory modules 4 Optional Install expansion cards For details see Installing expansion cards 5 Optional Connect expansion units For details see the following topics Connecting SATA JBOD expansion units Connecting USB expansion units 6 Connect the power cord and all applicable cables 7 Power on the NAS 8 Install QuTS hero For details see QuTS hero installation 9 Log on to QuTS he...

Page 15: ...ling 3 5 inch hard drives on 3 5 inch trays Warning Installing a drive deletes all data on the drive Observe electrostatic discharge ESD procedures to avoid damage to components Moving fan blades Keep your hands and other body parts away from moving fan blades Other moving components Keep your hands and other body parts away from other moving components 1 Power off the NAS 2 Remove the drive tray ...

Page 16: ...b Pull the tray handle outward c Pull the tray out 3 Install a drive on the tray a Remove the fastening panels from the sides of the drive tray TVS hx74T User Guide Installation and Configuration 15 ...

Page 17: ...on the sides of the drive are aligned with the holes on the sides of the tray c Attach the fastening panels to lock the drive to the tray d Optional Attach the screws to further secure the drive TVS hx74T User Guide Installation and Configuration 16 ...

Page 18: ...4 Load the tray into the bay a Insert the tray into the bay b Push the handle c Lock the tray TVS hx74T User Guide Installation and Configuration 17 ...

Page 19: ...ving fan blades Keep your hands and other body parts away from moving fan blades Other moving components Keep your hands and other body parts away from other moving components 1 Power off the NAS 2 Remove the drive tray a Optional Unlock the tray Note The preinstalled drive trays come unlocked Important Ensure the drive tray keys are stored in a safe place TVS hx74T User Guide Installation and Con...

Page 20: ...b Pull the tray handle outward c Pull the tray out 3 Install a drive on the tray a Remove the right fastening panel from the drive tray TVS hx74T User Guide Installation and Configuration 19 ...

Page 21: ...so that the holes on the bottom of the drive are aligned with the holes on the bottom of the tray c Attach the screws 4 Load the tray into the bay a Insert the tray into the bay TVS hx74T User Guide Installation and Configuration 20 ...

Page 22: ... 2 solid state drives The TVS hx74T series has two M 2 SSD slots on the Right panel For a list of compatible M 2 SSDs go to http www qnap com compatibility Warning Installing a drive deletes all data on the drive TVS hx74T User Guide Installation and Configuration 21 ...

Page 23: ...alling heatsinks on the M 2 SSD controllers to enhance cooling efficiency and to ensure consistent performance Before installing non QNAP heatsinks ensure that they are of the appropriate size and shape 1 Power off the device 2 Disconnect the power cord from the electrical outlet 3 Disconnect all cables and external attachments 4 Remove the case cover a Remove the screws b Slide the cover back c L...

Page 24: ...ot c Carefully press the M 2 SSD down until the spacer locks the drive into place d Verify that the M 2 spacer is firmly locking the M 2 SSD into place 6 Attach the case cover a Place the cover on the device b Slide the cover forward c Attach the screws TVS hx74T User Guide Installation and Configuration 23 ...

Page 25: ...o maintain system performance and stability You can purchase QNAP memory modules from authorized resellers For details on slot numbering see Right panel Warning Moving fan blades Keep your hands and other body parts away from moving fan blades Other moving components Keep your hands and other body parts away from other moving components Observe electrostatic discharge ESD procedures to avoid damag...

Page 26: ...e cover a Remove the screws b Slide the cover back c Lift the cover off the device 5 Remove an existing module a Push the retention clips outward simultaneously to release the module b Verify that the module has tilted upward and is completely released from the slot TVS hx74T User Guide Installation and Configuration 25 ...

Page 27: ...touch the internal components particularly the metal connectors Do not bend the module 6 Install a new module a Align the notch with the ridge in the slot b Insert the module into the slot c Verify that the metal connectors are completely inserted into the slot d Carefully press down on the module until the retention clips lock the module into place TVS hx74T User Guide Installation and Configurat...

Page 28: ...Slide the cover forward c Attach the screws 8 Connect all cables and external attachments 9 Power on the device 10 Verify that the module is recognized by the device a Log on to QuTS hero as administrator TVS hx74T User Guide Installation and Configuration 27 ...

Page 29: ...y parts away from moving fan blades Other moving components Keep your hands and other body parts away from other moving components Note Check the expansion card power supply requirements and compatibility list before installation For more information see www qnap com compatibility 1 Power off the device 2 Disconnect the power cord from the electrical outlet 3 Disconnect all cables and external att...

Page 30: ...e screw that secures the cover to the bracket b Pull the cover away from the slot 6 Optional Attach the QNAP bracket to the expansion card a Remove all screws of the existing bracket TVS hx74T User Guide Installation and Configuration 29 ...

Page 31: ...h the QNAP bracket to the card using the same screws d Verify that the bracket does not move 7 Install the expansion card a Hold the card by the edges b Insert the card into the slot c Attach the screw TVS hx74T User Guide Installation and Configuration 30 ...

Page 32: ... Slide the cover forward c Attach the screws connecting the top cover to the chassis 9 Connect all cables and external attachments 10 Connect the power cord to the electrical outlet 11 Power on the device TVS hx74T User Guide Installation and Configuration 31 ...

Page 33: ...Uses a USB 3 2 Gen 1 Type C interface Supports SATA HDD SDD USB 3 2 Gen 2 Type A to Type C cable USB 3 2 Gen 2 Type C to Type C cable TR 004U Uses a USB 3 2 Gen 1 Type C interface Supports SATA HDD SDD USB 3 2 Gen 1 Type A to Type C cable RAIL B02 TL D800C Uses a USB 3 2 Gen 2 Type C interface Supports SATA HDD SDD USB 3 2 Gen 2 Type A to Type C cable USB 3 2 Gen 2 Type C to Type C cable TL R1200C...

Page 34: ...ories details see Expansion unit installation 1 Power off the NAS 2 Install a host bus adapter on the PCIe slot For details see Installing expansion cards Important The QNAP QXP host bus adapter is required for connecting the SATA JBOD enclosure to a host device Third party host bus adapters are not compatible with QNAP JBOD enclosures 3 Connect the expansion units to the NAS Note This image shows...

Page 35: ...NAS a Connect the USB cable to the USB Type B or USB Type C port on the expansion unit b Connect the USB cable to a USB 3 2 Gen 2 Type A or USB Type C port on the NAS Note This image shows connecting the TVS h874T to the TL R1200C RP expansion enclosures 2 Power on the expansion units 3 Verify that the expansion units are recognized by the NAS a Log on to QuTS hero as administrator b Go to Main Me...

Page 36: ...uTS hero using Qfinder Pro Computer Network cable Qfinder Pro installer Cloud installation If the NAS is connected to the internet you can do the following Scan the QR code on the NAS Log into your myQNAPcloud account Use myQNAPcloud Link to remotely access your NAS Complete the steps in the Smart Installation Guide wizard For details see Initializing QuTS hero using the cloud installation website...

Page 37: ...Click Skip Skips firmware installation 8 Specify the following information NAS name Specify a name with 1 to 14 characters The name supports letters A to Z a to z numbers 0 to 9 and hyphens but cannot end with a hyphen Username Specify an administrator username that contains 1 to 32 characters The name can contain letters A to Z a to z numbers 0 to 9 and hyphens multi byte Chinese Japanese Korean ...

Page 38: ...o help you set up QNAP devices Warning Initializing QuTS hero deletes all data on the drives Back up your data before proceeding 1 Power on the device 2 Connect the device to the internet 3 Go to the QNAP Cloud Installation website using one of the following methods On your computer go to the website dedicated to your region Global https install qnap com China https install qnap com cn Or scan the...

Page 39: ... different operating system click QuTS hero The NAS restarts and the smart installation screen shows QuTS hero as the operating system to install 9 Click Start Smart Installation Guide The Install Firmware window appears 10 Install firmware using any of the following methods Installation methods Steps Automatic Click Start Automatically searches for available firmware updates and installs firmware...

Page 40: ...ports all ASCII characters 12 Click Next 13 Specify the time zone date and time Tip QNAP recommends connecting to an NTP server to ensure that the NAS follows the Coordinated Universal Time UTC standard 14 Click Next The Configure the network settings screen appears 15 Select Obtain an IP address automatically DHCP 16 Click Next 17 Review the settings 18 Click Apply A confirmation message appears ...

Page 41: ...tters without special characters For example if the first MAC address is 00 08 9B F6 15 75 then the admin password would be 00089BF61575 Tip You can find the first MAC address with Qfinder Pro or attached to a label on the device listed as MAC1 TCP IP configuration Obtain IP address settings automatically via DHCP Disable jumbo frames If port trunking is enabled multi LAN models only the port trun...

Page 42: ...device Configure or change the LCD panel password View and configure network settings View information on the system physical disks and shared folders Viewing TCP IP settings You can view the following settings for each network adapter on the NAS IP address Subnet mask Default gateway Primary DNS Secondary DNS 1 Press Enter or Select The panel displays the NAS name and QuTS hero version 2 Press an...

Page 43: ... a configuration screen 7 After configuring the settings press Select repeatedly until the panel displays Network Restart Important If you do not see Network Restart the system will not save the configured settings The system saves the settings Viewing drive information The LCD panel can display the temperature and capacity of each drive installed in the NAS 1 Press Enter or Select The panel displ...

Page 44: ...Press Enter or Select The panel displays the NAS name and QuTS hero version 2 Press and hold Enter for two seconds The panel displays Main Menu 1 TCP IP 3 Press Select repeatedly until the panel displays Main Menu 4 System 4 Press and hold Enter The panel displays the CPU and system temperature 5 Press and hold Select The panel displays the system fan speed Powering off the NAS 1 Press Enter or Se...

Page 45: ...en appears 6 Press Select and Enter to specify a new password Specify a password Length 1 8 characters Valid characters 0 9 To delete a password leave the password field blank Move the cursor to OK Button Usage Enter Move to the next item in the New Password screen Select Change a character in the New Password and Verify Password screens 7 Press Enter The NAS saves the password LCD error messages ...

Page 46: ...ormatted The device is being initialized The operating system is being updated RAID rebuilding is in progress Online RAID Capacity Expansion is in progress Online RAID Level Migration is in progress The firmware is being updated Important When updating the firmware do not remove the power cord or USB cable and do not force exit the application Red A drive is invalid A shared folder has reached its...

Page 47: ...Data is being accessed and during the process a drive read write error occurred Red A drive read write error occurred Flashes green Data is being accessed Green The drive is ready Off No drive was detected LAN LED Status Description Orange The network connection is operating Flashes orange The device is being accessed from the network Off The device is not connected to a network 2 5 Gigabit Ethern...

Page 48: ...B device connected to the front USB port is being accessed Blue A USB device is detected in the front USB port Off No USB device is detected The NAS has finished copying data to or from the USB device connected to the front USB port Expansion LED Status Description Blue A QNAP USB or SATA external storage device is connected Off No expansion unit has been detected Audio alert Duration Frequency De...

Page 49: ...d full capacity A storage pool status error occurred A shared folder is about to reach its full capacity A shared folder has reached its full capacity The drives are in degraded mode A drive is rebuilding A shared folder status error occurred A drive is plugged in or out 1 The NAS is powering off The NAS was powered off by force shutdown hardware shutdown The NAS was powered on successfully and is...

Page 50: ...Important Due to incompatibilities in file system system migration between QTS NAS and QuTS hero NAS is not supported Warning Migrating drives between QTS NAS and QuTS hero NAS can cause data corruption The destination NAS must have sufficient free drive bays to accommodate all the drives that you are migrating from the source NAS For NAS models that do not support NAS migration you can migrate ex...

Page 51: ...censes are not migrated Warning To prevent losing all your software licenses QNAP recommends deactivating licenses on the source NAS before data migration Applications If the destination NAS has less RAM than the source NAS the following features and applications might not function Virtualization Station Qsirch and Snapshots Services Only services supported by the destination NAS are available Mul...

Page 52: ...paring the destination NAS 1 Log on to QTS 2 Create one or more storage pools For details see the Creating a Storage Pool topic in the QTS user guide 3 Create one or more volumes For details see the Volume Creation topic in the QTS user guide 4 Create shared folders on the destination NAS For details see the Creating a Shared Folder topic in the QTS user guide 5 Install HBS 3 onto the destination ...

Page 53: ...Space window appears 6 Select the destination NAS as the destination storage space and specify the following Setting Description Name The name used to identify the storage space IP address Host name The IP address or hostname used to access the storage space Tip Click to scan for available devices Port The port number used to access the storage space This value must be between 1 to 65535 Password ...

Page 54: ... 13 Click Next The Rules screen appears 14 Optional Configure job rules 15 Click Next The Summary screen appears 16 Review the job summary 17 Click Create The source NAS runs the created one way sync job Note It may take several minutes to migrate shared folders from the source NAS to the destination NAS Importing local users or group settings to the destination NAS 1 Power on the source NAS 2 Bac...

Page 55: ... your source NAS For the list of NAS models compatible with direct NAS migration see https www qnap com en nas migration Your device must meet the following requirements The destination NAS must run on the same QuTS hero version as the source NAS or later Important Due to incompatibilities in file system system migration between QTS NAS and QuTS hero NAS is not supported Warning Migrating drives b...

Page 56: ...ttings may change and require reconfiguration port trunking virtual machines Thunderbolt and more Windows AD configuration Windows AD configurations must be reconfigured Licenses Licenses are not migrated Warning To prevent losing all your software licenses QNAP recommends deactivating licenses on the source NAS before data migration Applications If the destination NAS has less RAM than the source...

Page 57: ...b Remove the drive trays from the destination NAS 3 Install the drives a Install source NAS drives onto the destination NAS drive trays b Insert the drive trays into the destination NAS 4 Power on the destination NAS 5 Log on to QuTS hero as an administrator on the destination NAS The destination NAS automatically checks for the latest firmware update TVS hx74T User Guide NAS Migration 56 ...

Page 58: ...fails RAID 6 4 One or two member drives fail RAID 10 4 Must be an even number One or two member drives in two different pairs fail RAID 50 6 One disk per subgroup fails RAID 60 8 Two disks per subgroup fail Triple Mirror Multiple of 3 For example 3 6 9 12 disks and so forth One or two member drives fail RAID TP 5 One two or three member drives fail 1 Log on to QuTS hero 2 Go to Main Menu Storage S...

Page 59: ...s 3 1 RAID 6 Yes 4 2 RAID 10 Yes 4 Must be an even number One disk per subgroup fails RAID 50 Yes 6 One disk per subgroup fails RAID 60 Yes 8 Two disks per subgroup fail Triple Mirror Yes Multiple of 3 For example 3 6 9 12 disks and so forth 2 RAID TP Yes 5 3 Support and other resources QNAP provides the following resources Resource URL Documentation https download qnap com Compatibility List http...

Page 60: ...ink myQNAPcloud Link Enables you to access QNAP devices over the internet without configuring complex port forwarding settings Qfinder Pro QNAP utility that lets you locate and access QNAP NAS devices in your local area network QTS QNAP NAS operating system QuTS hero QNAP NAS operating system featuring ZFS file system TVS hx74T User Guide Glossary 59 ...

Page 61: ... consequential damages resulting from the use of the product its accompanying software or its documentation QNAP makes no warranty or representation expressed implied or statutory with respect to its products or the contents or use of this documentation and all accompanying software and specifically disclaims its quality performance merchantability or fitness for any particular purpose QNAP reserv...

Page 62: ...received You must make sure that they too receive or can get the source code And you must show them these terms so they know their rights Developers that use the GNU GPL protect your rights with two steps 1 assert copyright on the software and 2 offer you this License giving you legal permission to copy distribute and or modify it For the developers and authors protection the GPL clearly explains ...

Page 63: ...in the normal form of packaging a Major Component but which is not part of that Major Component and b serves only to enable use of the work with that Major Component or to implement a Standard Interface for which an implementation is available to the public in source code form A Major Component in this context means a major essential component kernel window system and so on of the specific operati...

Page 64: ...ing Modified Source Versions You may convey a work based on the Program or the modifications to produce it from the Program in the form of source code under the terms of section 4 provided that you also meet all of these conditions a The work must carry prominent notices stating that you modified it and giving a relevant date b The work must carry prominent notices stating that it is released unde...

Page 65: ... Library need not be included in conveying the object code work A User Product is either 1 a consumer product which means any tangible personal property which is normally used for personal family or household purposes or 2 anything designed or sold for incorporation into a dwelling In determining whether a product is a consumer product doubtful cases shall be resolved in favor of coverage For a pa...

Page 66: ...ble ways as different from the original version or d Limiting the use for publicity purposes of names of licensors or authors of the material or e Declining to grant rights under trademark law for use of some trade names trademarks or service marks or f Requiring indemnification of licensors and authors of that material by anyone who conveys the material or modified versions of it with contractual...

Page 67: ... with reasonable efforts You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License For example you may not impose a license fee royalty or other charge for exercise of rights granted under this License and you may not initiate litigation including a cross claim or counterclaim in a lawsuit alleging that any patent claim is infringed by making ...

Page 68: ...other pertinent obligations then as a consequence you may not convey it at all For example if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program 14 Use with the GNU Affero General Public License Notwithstandi...

Page 69: ...G RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 18 Interpretation of Sections 16 and 17 If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms reviewing c...

Page 70: ...guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipme...

Page 71: ...管这些元件将会单独标示出来部件名称有毒有害物质或元素铅 Pb 汞 Hg 镉 Cd 六价铬 CR VI 多溴联苯 PBB 多溴二苯醚 PBDE 壳体 0 0 0 0 0 0 显示 0 0 0 0 0 0 印刷电路板 0 0 0 0 0 0 金属螺帽 0 0 0 0 0 0 电缆组装 0 0 0 0 0 0 风扇组装 0 0 0 0 0 0 电力供应组装 0 0 0 0 0 0 电池 0 0 0 0 0 0 O 表示该有毒有害物质在该部件所有物质材料中的含量均在 SJ T11363 2006 标准规定的限量要求以下 X 表示该有毒有害物质至少在该部件的某一均质材料中的含量超出 SJ T11363 2006 标准规定的限量要求 TVS hx74T User Guide Notices 70 ...

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