变速杆

inertia gear drive starting motor (Bendix drive starting motor),

gear honing machines with worm-shaped hone【机】

gear backlash【机】

dentiform【动】;gear form【机】;profile of tooth【机】

distributing valve-gear (valve gear)

telemotor gear【自】

seat-valve gear internal-combustion piston engine, positive-displacement machine

ratchet gear