with member, pin, cross-piece, or the like ruptured, sheared through, or permanently deformed upon excessive pressure

Full Title

Props; Chocks > Telescopic props > with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure > with member, pin, cross-piece, or the like ruptured, sheared through, or permanently deformed upon excessive pressure

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

EARTH OR ROCK DRILLING; MINING

Subclass:

SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS