- 5 -
(except coal mine)”, GB3836.16-2006 “explosive air environmental electrical
equipments the sixteen part: the check and maintenance of the electric installation
(except coal mine)” and GB50257:1996 “the relevant regulations of “the
explosion of the installation works of electrical equipments and the construction
of electrical installation in the fire dangerous environment”.
II. The appearance of the instrument
The definition of the keypad parts
Key
Definition
▲
[Upper key]the upper direction key
▼
[Lower key] the lower direction key
