齿轮卷曲机

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

pedestal change-speed gear of the diving key type

gear honing machines with worm-shaped hone【机】

gear backlash【机】

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

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

distributing valve-gear (valve gear)

gear set