| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| JB/T 53512-1997 | English | 519 |
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Days<=4
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(Underground LHD product quality grading (for internal use))
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JB/T 53512-1997
| Obsolete |
JB/T 53512-1997
|