“preparatory function instruction”的概念、定义、翻译、参考文献-科学参考

单词	preparatory function instruction
释义	preparatory function instruction Encyclopedia 工学数控机床坐标系统释 preparatory function instruction准备功能指令零件数控加工编程中，用以指定机床或控制系统建立加工功能的方式，使数控机床准备好与插补有关的某种运动方式的指令。又称G代码、G指令。
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