| http://www.w3.org/ns/prov#value | - A Pulley, also called a sheave or a drum, is a mechanism composed of a wheel on an axle or shaft that may have a groove between two flanges around its circumference.A rope, cable, belt, or chain usually runs over the wheel and inside the groove, if present.Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear
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