गरारी

gear

a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion

pulley

a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope

alfalfa

important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop

ratchet

mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction