| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| JJG 1138-2017 | English | 419 |
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Days<=4
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Non-dispersive Infrared Methane Transmitters for Coal Mine
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JJG 1138-2017
| Valid |
JJG 1138-2017
|