| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 42638-2023 | English | 339 |
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Days<=4
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The direct measuring method of the coal seam gas drainage radius in coal mine - Method of drainage volume
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GB/T 42638-2023
| Valid |
GB/T 42638-2023
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