oil lubrication

基本解释

Oxygen compressor usually use no oil lubrication compressor.
氧气压缩机通常使用无油润滑压缩机。
Compression purity require special high gas such as propane, generally USES no oil lubrication.
压缩纯度要求特别高的气体如丙烷，一般采用无油润滑。
If you use oil lubrication, can use soap lubricant or ethanol soap solution, in order to provide the necessary lubrication.
若采用油润滑时，可用肥皂润滑剂或乙醇肥皂溶液，以提供必要的润滑。

There is no alternative to machine lubrication outside of oil.
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