齿轮展成

variable-speed gear (change gear, gear change box)

gear honing machines with worm-shaped hone【机】

gear backlash【机】

two-stage harmonic gear drive【机】

making gear teeth by rolling off a tool relatively to a workpiece

Gear

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

distributing valve-gear (valve gear)