传动机构选择性地控制开口与阀口对准的持续时间。

A gearing mechanism selectively controls the duration in which the openings are aligned with the ports.

youdao

传动机构选择性地控制开口与阀口对准的持续时间。

A gearing mechanism selectively controls the duration in which the openings are aligned with the ports.

youdao