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| Chinese National Standard Category: Mine support equipment |
| English Title: | Frictional metal prop |
| Chinese Title: | 摩擦式金属支柱 |
| Standard No.: | MT 646-1997 |
| Category No.: | D97 |
| Issued by: | Ministry of Coal Industry |
| Issued on: | 1997-11-10 |
| Implemented on: | 1998-4-1 |
| Status: | abolished |
| Superseded by: | |
| Superseded on: | |
| Abolished on: | 2017-11-10 |
| Superseding: | MT 5-1974 |
| Word Count: | 4000 words |
| Similar Standards: | MT 112-1993 NB/T 10950-2022 NB/T 10954-2022 NB/T 10743-2021 NB/T 10742-2021 MT/T 1192-2020 GB/T 35056-2018 NB/T 51020-2014 GB/T 25974.3-2010 GB 25974.1-2010 GB/T 25974.2-2010 GB 25974.2-2010 GB 25974.3-2010 MT/T 986-2006 MT/T 985-2006 MT 112.1-2006 MT/T 979-2006 MT/T 972-2006 MT/T 942-2005 MT 94-1984 |
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