用扳手抓住上部和下部阀杆锁紧螺母并且松开。

Grasp upper and lower stem lock nut with wrench and loosen.

youdao

用扳手抓住上部和下部阀杆锁紧螺母并且松开。

Grasp upper and lower stem lock nut with wrench and loosen.

youdao