作用是防止泵壳内液体沿轴漏出或外界空气漏入泵壳内。

Role is to prevent the pump shell leakage of liquid along the axis or outside air leakage into the pump shell.

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如果作品在外界空气中重新燃着了一丁点的火花，那么你最终只能得到一堆灰烬。

If the work catches alight again in the open air then you definitely end up with a pile of ash.

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发电机密封油系统的作用是为了防止外界空气进入发电机内部及阻止发电机内氢气漏出。

Generator sealing oil system is designed to prevent outer air from entering the generator and avoid leakage of hydrogen from the generator.

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