The fuction of automatic programming soft ware for NC machining is introduced. It is proved by model machined that this software is practical and useful.

介绍了涡旋槽数控加工自动编程软件的功能，经多台样机加工证明，该软件切实可行。

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The performance test demonstrates that the speed of soft PLC is much higher than that of common PLC. The further soft PLC application in open nc system can use this work for references.

对软plc的性能测试表明，软plc的执行速度较硬plc有了大幅度提高，为软plc在开放式数控系统中的应用提供了借鉴。

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