gear [rack; toothed] wheel; (toothed) gear; wheel gear
bevel gear
伞齿轮
helical gear
斜齿轮
spur gear
正齿轮
get [put; throw] into gear
搭上齿轮
out of gear
齿轮脱开
This large gear turns the small one to rotate the cylinder.
这个大齿轮带动小齿轮使滚筒旋转。
The teeth of the wheel gear into each other.
齿轮互相啮合。