A metallic tube closed at one end, containing a charge of one or more detonating compounds, and designed for and […]

Using explosives to loosen rock or other closely packed materials.

A drill which cuts holes in rock for the placement of explosives.

A hole drilled into rock in which an explosive charge is to be placed.

A heater consisting of a set of heat-transfer coils (or sections) through which air is drawn or forced by a

An upright freezer in which air, at a very low temperature, is circulated by blowers; used to freeze foods in

Any cleaning process, such as sandblasting, in which an abrasive is directed at the surface with high velocity.