IPC Subgroup
E21D 17/082 of sliding type
Introduced: September 1968
Last revised: January 2006
Full Title
Caps for supporting mine roofs > Cantilever extension or similar protecting devices > Cap joints for obtaining a coal-face free of pit-props > of sliding type
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS