An arrangement of shafts and gears such that the number of revolutions of the output shaft is less than of the input shaft--generally used between a motor or a steam turbine shaft and the propeller shaft.
Ulungelelaniso lweeshanki neegiya ngendlela eyenza ukuba inkupho yeshafti ibe ncinane kunokungena kwishafti, isetyenziswa emotweni okanye kwishafti yomphunga kunye neshafti yesiqhubeli phambili.