但是几年之后，一台能够在水下工作的压缩机是必需的，用来补充气田中下降的压力。

But in a few years a compressor that can work underwater will be needed to supplement the falling pressure in the field.

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另外，压缩机的现场替换也会造成冷冻油的流失或是变质，这时就需要补充部分冷冻油。

In addition, compressor can also cause the site to replace the loss of oil or frozen metamorphism, and it takes supplement frozen oil part.

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LM500系列维持发动机曲轴箱，压缩机或泵的油位，油位过低时自动调整补充油位到机器正常运转需要的油位。

The LM500 series maintains the crankcase oil level of an engine, pump or compressor. Adjusted to the correct running-oil-level, it will replenish oil as it is used.

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