Oil seal: or shaft seal, in machines, a device that prevents the passage of fluids along a rotating shaft.

油封，亦称轴封：机器中用以防止流体沿转轴泄漏的装置。

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Oil seal: or shaft seal, in machines, a device that prevents the passage of fluids along a rotating shaft.

油封，亦称轴封：机器中用以防止流体沿转轴泄漏的装置。

youdao