| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YBJ 221-1990 | English | RFQ |
ASK
|
Days<=11
|
(Metallurgical and mining construction survey specification)
|
YBJ 221-1990
| Obsolete |
YBJ 221-1990
|