我们还通过使用屏幕坐标（请参阅 help coordinates ，获得关于不同类型坐标系统的讨论）设置原点来控制曲线图显示的位置。
We also control where the graph appears by setting the origin using screen coordinates (see help coordinates for a discussion on the different kinds of coordinate systems).
应用数控机床加工零件，当零件外形简单，编程时可设置一次工件坐标系（编程原点），即可完成零件的加工；
When using CNC machines to process the part, it can set the part reference frame (the origin of programming) once to complete the process if the outline of part is simple.
工件零点是工件坐标系的原点，在数控镗铣加工中心上，一次装夹需要设置多个工件零点。
The workpiece zero is the origin of the workpiece coordinate system. When workpiece were set up on NC machine center, normally we need define more than one workpiece zero.
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