The prior shaft head seals have the defects of easily broken, damaged and worn dynamic and static contact surface.

现有轴头密封动、静接触面易碎、易损，不耐磨。

youdao

The prior shaft head seals have the defects of easily broken, damaged and worn dynamic and static contact surface.

现有轴头密封动、静接触面易碎、易损，不耐磨。

youdao