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IPC Subgroup
E21D 11/38

Waterproofing; Heat insulating; Soundproofing; Electric insulating

Introduced: July 1974

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 > Waterproofing; Heat insulating; Soundproofing; Electric insulating

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
EARTH OR ROCK DRILLING; MINING
Subclass:
SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS