在气门下降段，将气门的落座速度和下降段缓冲包角取小些，使得气门落座平稳，无激烈的冲击现象。

During the drop, better have a lower speed of resitting and a smaller wrap Angle, which can have a smooth resitting without fierce impact.

youdao

在气门下降段，将气门的落座速度和下降段缓冲包角取小些，使得气门落座平稳，无激烈的冲击现象。

During the drop, better have a lower speed of resitting and a smaller wrap Angle, which can have a smooth resitting without fierce impact.

youdao