cylindrical gearwheel

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lantern wheel — noun a cylindrical gearwheel … English new terms dictionary
helical gear — noun also helical ( s) : a gear wheel having teeth set obliquely to the axis of rotation : screw wheel * * * a cylindrical gear wheel whose teeth follow the pitch surface in a helical manner. [1885 90] * * * helical gear, a gearwheel whose teeth… … Useful english dictionary

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