无定位调节作用所涉及的是这样一种调节机构，即它能停顿在其行程中的任意一处位置上。

Floating action refers to a controlled device which can stop at any point in its stroke.

youdao

无定位调节作用所涉及的是这样一种调节机构，即它能停顿在其行程中的任意一处位置上。

Floating action refers to a controlled device which can stop at any point in its stroke.

youdao