单选:数控编程进位暂停按纽工作是()。

题目内容:
数控编程进位暂停按纽工作是()。
A.自动正转时,刀具快速停止,主轴停止
B.自动正转时,刀具快速停止,主轴不停
C.自动正转时,刀具减速停止,主轴停止
D.自动正转时,刀具减速停止,主轴不停
参考答案:

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