These seals consist of two flat faces, one extremely hard, the other softer, in direct contact except for a thin film of the oil being pumped.

这些密封有两个平面，一个很硬、另一个较软，两平面间除一层被泵送的油外，直接接触。

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These seals consist of two flat faces, one extremely hard, the other softer, in direct contact except for a thin film of the oil being pumped.

这些密封有两个平面，一个很硬、另一个较软，两平面间除一层被泵送的油外，直接接触。

youdao