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A train of levers in which motion or force is transmitted from the arm of one lever to that of the next.

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COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

JOURNAL BEARING

A sliding type of bearing having either rotating or oscillatory motion and in conjunction with which a journal operates. In a full or sleeve type journal bearing, the bearing surface is 360° in extent. In a partial bearing, the bearing surface is less than 360° in extent, i.e., 150°, 120°, etc.

DAVIT

A crane arm for handling lifeboats, stores, etc.

HARMONIC MOTION

The projection of circular motion on a diameter of the circle of such motion. Simple harmonic motion is produced if the circular motion is of constant speed. The combination of two or more simple harmonic motions results in compound harmonic motion.

HEAVE

The oscillatory vertical rise and fall, due to the entire hull being lifted by the force of the sea. Also called HEAVING

DUNNAGE

Cushioning material placed among cargo to prevent their motion

FRICTION

The resisting force encountered at the common boundary between two bodies when, under the action of an external force, one body, moves or tends to move relative to the surface of the other.

HYDRODYNAMIC LUBRICATION

A system of lubrication in which the shape and relative motion of the sliding surfaces causes the formation of a fluid film having sufficient pressure to separate the surfaces.

FRETTING

Wear phenomena taking place between two surfaces having oscillatory relative motion of small amplitude.
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