轴肩shoulder
凸台boss
凹坑concave pit
轴颈shaft neck
轮毂hub
轮辐spoke, spoke of wheel
直纹滚花straight knurling s
网纹滚花hatching knurling
键槽key-way
退刀槽escape
拔模斜度pattern draft
填料盒gland box
油槽oil groove
油封oil seal
标准件standard parts
螺纹thread
外螺纹external thread
内螺纹internal thread
大径major diameter
小径minor diameter
螺距pitch of thread
牙型form of thread