As NC machines need a large capital investment, we should efficiently use them.

We should use the language ()(purpose).

EDM（Electrical Discharge Machining）refers to in Chinese term

Part programmers must have a solid knowledge of machining processes and know a lot of the capabilities of the machine tool.

NC part programming includes three tasks: the collection of all data needed, the calculation of the tool path and the arrangement of those given and calculated data.

The required data contained in each line of the manuscript includes all machining instructions for transferring the cutting tool from one point to the next one.

The core of ________, however, is preparation of the manuscript, its conversion into a verified tape, and subsequent editing.

Programmers should ________ the particular NC machine, its capabilities, and specific codes.

Never attempt to machine a work-piece without first checking the operation of the machine.

When using a tool compensation function,you should check the direction and amount of compensation.

Before starting a production run, it's not necessary to perform a trial run.