tight pulley

camshaft(journal )turning lathe

凸轮轴（轴颈）车床

overhead cam shaft

上凸轮轴上部凸轮轴

cam shaft driving gear

凸轮轴传动齿轮凸轮轴传动装置

reverse idler gear shaft bearing

回动空转齿轮轴轴承

Spokes radiate from a wheel huB.

轮条从轮轴向四周伸出

cam shaft drive

凸轮轴传动凸轮轴传动装置

Undersize crankshaft main bearing journals.

尺寸小于标准的凸轮轴主轴承轴颈。

aircraft gas turbine bearing lubrication

飞机燃气涡轮轴承润滑

primary planet ring

一级行星齿轮轴座圈

overhead camshaft engine

上置式凸轮轴发动机

crankcase cam gear bushing

曲轴箱凸轮传动轴衬套

twin-input single-output gear

双主动齿轮单出轴齿轮

Drive axle (4WD), tube axle (2WD)

驱动轴（4轮驱动），管轴（2轮驱动）

An enlarged part of a shaft to which another shaft is coupled or to which a wheel or gear is keyed.

轮毂一轴与另一轴耦合处或一轴与机轮或齿轮楔合处的增大部分

axial flow turbojet

轴流式涡轮喷气发动机

A wheel revolves round [on] its axis.

轮子是绕轴旋转的。

parallel axis gear

平行轴传动减速齿轮

The pin holds the wheel on

轴销把轮子固定起来。