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A mechanism designed to rotate and to cause an annular-shaped rockcutting bit to penetrate rock formations, produce cylindrical cores of the formations penetrated, and lift such cores to the surface, where they may be collected and examined.

Related Terms

ROTARY COMPRESSOR

Mechanism which pumps fluid by using rotating motion.

BEARING

A support or guide by means of which a moving part such as a shaft or axle is positioned with respect to the other parts of a mechanism.

ANNULAR BEARING

Usually a rolling bearing of short cylindrical form supporting a shaft carrying a radial load.

BELLOWS

Corrugated cylindrical container which moves as pressures change, or provides a seal during movement of parts.

SPLASH LUBRICATION

A system of lubrication in which parts of a mechanism dip into and splash the lubricant onto themselves and/or other parts of the mechanism.

ROTARY BLADE COMPRESSOR

Mechanism for pumping fluid by revolving blades inside cylindrical housing.

ROTARY BLADE COMPRESSOR

Mechanism for pumping fluid by revolving blades inside cylindrical housing.

CIRCUIT BREAKER

A switch-type mechanism that opens automatically when it senses an overload (excess current).

HIGH-SIDE FLOAT

Refrigerant control mechanism which controls the level of the liquid refrigerant in the high-pressure side of mechanism.

CYLINDER LINER

The cylindrical piece forming the inner surface of engine's cylinder. It guides reciprocating piston and forms the walls of combustion chamber,
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