change-gear
Change gear. (Mach.) Defn: A gear by means of which the speed of machinery or of a vehicle may be changed while that of the propelling engine or motor remains constant; -- called also change-speed gear.
Change gear. (Mach.) Defn: A gear by means of which the speed of machinery or of a vehicle may be changed while that of the propelling engine or motor remains constant; -- called also change-speed gear.