The mandrel must be mounted between centers and a drive plate and lathe dog must be used.
必须将心轴锚定在中心点和驱动板之间的位置，并且必须使用车床轧头。
This is made from a part which is machined up on the lathe and tapped for screwing into the valve-plate, and a short section of steel tubing.
这是由一个是加工上的车床和到阀板拧挖掘的一部分，以及钢管短节。
The lathe is mainly used for machining shaft, plate, sets and other has turned the workpiece surface, and machinery factory is engaged in the most widely used kind of machine tool.
车床主要用于加工轴、盘、套和其他具有回转表面的工件，是机械制造和修配工厂中使用最广的一类机床加工。
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