Rigid-type double-tube core barrel, английский A double-tube core barrel in which both the outer and inner tubes are rigidly connected to a single headpiece.
Rigid-type double-tube core barrel, английский A double-tube core barrel in which both the outer and inner tubes are rigidly connected to a single headpiece.
Reset bit, английский A bit made by reusing the sound diamonds salvaged from a used bit and setting them in the crown attached to a new bit blank. some new diamonds usually are added to those salvaged, since generally not all of the salvaged or recovered stones are reusable. also called replacement bit.
