Only no oil to produce an air compressor oilfreecompressedair.
只有无油空气压缩机才能产生无油的压缩空气。
2
When air padding is allowed and appropriate, it is imperative that clean, oil-free, cooled, dry compressedair be introduced into the vapor space.
当空气填料被允许而且是适当的时候，所引入的空气必须是洁净的、无油的、冷却的、干燥的压缩空气。
3
The bottom of the electric casting tank is provided with an exhaust pipe which is besprinkled with tiny holes, and oil-freecompressedair are put in the exhaust pipe to play stirring action.