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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 3836.7-2017 |
Explosive atmospheres—Part 7: Equipment protection by powder filling “q” 爆炸性环境 第7部分：由充砂型“q”保护的设备 |
China National Standards “q” |
 English PDF |
| GB 3836.7-2004 |
Electrical apparatus for explosive gas atmospheres--Part 7:Powder filling“q” 爆炸性气体环境用电气设备 第7部分:充砂型“q” |
China National Standards “q” |
English PDF |
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