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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