| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| DZ 46-1987 | English | 239 |
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Days<=2
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(Vertical shaft geological core drilling rig. Quality grading regulations)
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DZ 46-1987
| Obsolete |
DZ 46-1987
|