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Dictionary

dif'feren'tial wind'lass

a pair of hoisting drums of different diameter turning at the same rate, such that a pulley suspended below them on a line wound on the larger drum and unwound from the smaller drum is raised with mechanical advantage. Also called Chinese windlass.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

differential weathering

differentiate

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