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Definitions

worm gear traction

Geared traction elevators in which the sheave is driven by a screw-like gear meshed with a worm gear.

Worm gear traction elevators are geared traction elevators in which the gears driving the sheave are in the form of a screw-like cylinder (a "worm") meshed with a wheel indented with diagonally-aligned teeth (a "worm gear").

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