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differential windlass

a windlass with two drums of different diameters providing a mechanical advantage

See differential windlass in American Heritage Dictionary 4

noun
A hoisting device that has two drums of different sizes on the same axis. A line wound on the larger and unwound from the smaller drum provides extra lifting power. Also called Chinese windlass.

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differential windlass

A differential windlass requires minimum effort to lift considerable weight.

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differential windlass

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