当这发生时，气门弹簧紧紧地封闭气门口，叫做气门座。

As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.

youdao

当这发生时，气门弹簧紧紧地关闭气门口，叫做气门座。

As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.

youdao

当这发生时，气门弹簧紧紧地关闭气门口，叫做气门座。

As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.

youdao