| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 50257-1996 | English | RFQ |
ASK
|
Days<=11
|
Code for construction and acceptance of electric device for explosion atmospheres and fire hazard electrical equipment installation engineering
|
GB 50257-1996
| Obsolete |
GB 50257-1996
|