排除：清除杂物，更换已损坏的橡皮垫，改变阀片方向；

Excluded: debris removal, replacement of damaged rubber pad to change the direction of the valve;

youdao

排除：清除杂物，更换已损坏的橡皮垫，改变阀片方向；

Excluded: debris removal, replacement of damaged rubber pad to change the direction of the valve;

youdao