IPC Subgroup
E21D 17/1 Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
Introduced: September 1968
Last revised: January 2006
Full Title
Caps for supporting mine roofs > Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS