题目内容 (请给出正确答案)
提问人:网友d*******1 发布时间:2023年1月16日 07:59
[单项选择题]

()滚珠丝杠调整机构具有双向自锁作用。

A.弹簧式

B.螺纹式

C.随动式

D.主动式

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