oil-free compressed air 无油压缩空气
Only no oil to produce an air compressor oil free compressed air.
只有无油空气压缩机才能产生无油的压缩空气。
The bottom of the electric casting tank is provided with an exhaust pipe which is besprinkled with tiny holes, and oil-free compressed air are put in the exhaust pipe to play stirring action.
在电铸槽底部设一布满微孔的排气管，并通入无油压缩空气起搅拌作用；
To do the job at home, you'll only need a few things: isopropyl alcohol, some purified or bottled water, a lint-free cloth, and some compressed air if you've got some.
在家里就能做这项工作，你仅仅需要一些东西：异丙醇，一些纯将瓶装水，一件不起毛的衣服，和一些压缩空气(如果你能得到的话)。
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