friction hoist
... that a friction hoist can require up to 30 percent less motor power than a drum hoist for a given application?
... that a <b id="mwGVE"><a href="./Hoist_(mining)" id="mwGVI" rel="mw:WikiLink" title="Hoist (mining)">friction hoist</a></b> can require up to 30<span id="mwGVM" typeof="mw:Entity"> </span>percent less motor power than a drum hoist for a given application?