Device for feeding fluid for the spraying of picks in a shearing
Device for intermittently subjecting axially shiftable bits of a
Device for preventing ingress of dust through the annular gap be
Device for producing a gas-liquid mixture in the vicinity of...
Device for supplying fluid at tools for breaking solid material
Device for supplying fluid to a tool for breaking hard material
Device for supplying fluid to a tool for breaking hard material
Drag bit construction