specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves

Full Title

Props; Chocks > Component parts or details of props > specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

EARTH OR ROCK DRILLING; MINING

Subclass:

SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS