| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 50257-2014 | English | 1439 |
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Days<=10
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Code for construction and acceptance of electric device for explosion atmospheres and fire hazard electrical equipment installation engineering
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GB 50257-2014
| Valid |
GB 50257-2014
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