IPC Main Group
E21D 7/00 Shaft equipment, e.g. timbering within the shaft
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Related Keywords
GUIDES for lifts
1 direct subcode
Child Classifications
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- E21D 7/02 Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls