Numerical Control (nc) is any machining process in which the operations are executed automatically in sequences as specified by the program that contains the information for the tool movements.
数字控制是按照含有机床(刀具)运动信息程序所指定的顺序自动执行操作的加工过程。
Now the numerical control machines of small memory are still the mainstream in our country. The NC machines make the program of machining more concise, which is very important in practice.
目前，小内存的数控机床仍然是我国机床的主流，使加工程序变得简洁，对实际加工有着很重要的意义。
Finally introduced the varied deep screw numerical control processing program skill and partial programming and cautions during machining.
最后介绍了不等深螺杆数控加工的编程技巧及部分程序，以及加工时的注意事项。
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