Hemû hewaya atmosferê mîqdarek avên avî heye. Naha, atmosfera wekî sponek mezin, hûrgulî ya hişk bifikirin. Ger em sponge pir hişk bikin, ava vexwarinê diherike. The same happens when the air is compressed, which means the concentration of water increases and these water vapor condenses into liquid water. To avoid problems with the compressed air system, using the post cooler and drying equipment is required.
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