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International Standard Category: Mining and minerals |
Category No.: | 73 | Valid Status: | superseded |
Issued Organization: | Issued Date: | 1990-06-26 | |
Implemented Date: | 1991-5-1 | Abolished Date: | |
Superseded Standard.: | GB 50213-2010 Code for acceptance of shaft sinking and drifting of coal mine |
Superseded Date: | 2010-12-1 |
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