MT 646-1997
Frictional metal prop (English Version)
- Standard No.
- MT 646-1997
- Language
- Chinese, Available in English version
- Release Date
- 1997
- Published By
- Professional Standard - Coal
- Latest
- MT 646-1997
- Replace
- MT 70-1983 MT 5-1974
- Scope
- This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of friction metal pillars. This standard applies to friction metal pillars used in mines.
MT 646-1997 history
- 1997 MT 646-1997 Frictional metal prop
- 1970 MT 70-1983 HZJA type metal pillar
- 0000 MT 5-1974
MT 646-1997 Frictional metal prop has been changed from MT 70-1983 HZJA type metal pillar.
