IPC Subgroup
E21D 11/06 with bricks
Introduced: September 1968
Last revised: January 2006
Full Title
Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings , e.g. by assembling > Lining with building materials > with bricks
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
1 direct subcode
Child Classifications
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- E21D 11/07 using brick-laying machines