IPC Subgroup
E21C 45/04 by use of highly pressurised liquid
Introduced: January 1990
Last revised: January 2006
Full Title
Methods of hydraulic mining; Hydraulic monitors > Means for generating pulsating fluid jets > by use of highly pressurised liquid
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- MINING OR QUARRYING