Shanghai Seven Trust Industry Co., Ltd.
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5. Use Φ10mm twist drill to make a pair of perforations at 80-100mm
above the post, fix the post and 200*80mm Crossbeam with M10 * 220mm
stainless steel screw.
2、
6.
Use Φ 5mm twist drill to drills drainage holes at the slot of 160
* 80mm beam.