Special parts (non rotary parts) in turning operations are hard to clamp in lathe.
在车削加工中，异型零件(非回转形零件)装夹困难。
2
The most widely used machine tool is the engine lathe, which provides a principle axis rotary primary motion to while the appropriate feed motions are imparted to the tool.
最用途广泛的机械工具是引擎车床，提供一个原则轴转台式主运动，当适当的合闸动作被给予到工具时。
3
Besides, using the vertical lathe to turn vanes can eliminate the defects that a floor-type horizontal machine is low in rotary speed, unstable in slewing and the like.