what is a polely? name its different tyeps
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- Pulleys consist of a wheel that rotates on an axle—which is a rod through the center of the wheel—and a rope, cable, or chain. There are three main types of pulleys: fixed, movable, and compound. A fixed pulley's wheel and axle stay in one place.
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Polly(noun) a woman's name; also, a popular name for a parrot.
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