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a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
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a pulley-block at the head of a topmast
a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing
a pulley on a shaft that presses against a guide belt to guide or tighten it
a pulley-block that can be opened to receive the bight of a rope
a device for overcoming resistance at one point by applying force at some other point
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