MT 644-1997
Active
MT/T 31-2011
Active
Industry standards-Coal
MT/T 31-2011 coal electric drill switch
MT/T 31-2011 coal electric drill switch
Basic Information
Standard Code:
MT/T 31-2011
Standard Type:
Industry standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Special equipment and supplies for coal mines
ICS Name:
Other mining equipment
Publish Date:
2011-04-12
Implement Date:
2011-09-01
Pages:
7 pages
Development Information
Replace the following standards
Related Standards
MT 646-1997
Abolished
MT 646-1997 Frictional metal prop
MT 668-1997
Replaced
MT 668-1997 Technical Conditions for Flame-Retardant Steel-Mesh-Core Conveying Belt for Coal Mines
MT 669-1997
Active
MT 669-1997 Technical condition of fire-resistant steel-cable conveyor-belt in coal mining
MT/T 154.7-1997
Active
MT/T 154.7-1997 Model designation of separating equipment for coal
MT/T 660-1997
Active