阀盖轴承和整体阀座轴承引导阀杆总成，实现与阀座的精确定位。

A cover bearing and integral seat bearing guide the stem assembly for precise alignment with the seat.

youdao

阀盖轴承和整体阀座轴承引导阀杆总成，实现与阀座的精确定位。

A cover bearing and integral seat bearing guide the stem assembly for precise alignment with the seat.

youdao