Sentence is too long, please supply a shorter sentence. Chillers are used for refrigeration to produce cold water that can be used in industry and air conditioning? However, at present most of the cold water refrigerator manufacturers buy parts and then assemble them, which inevitably leads to impure system phenomenon! In some areas, it is reported that the main pipeline of freight is made of stainless steel with low loss and even heat. From the working mechanism of refrigeration compressor, it can be seen that the design of anti-surge system and the noise of large capacity units are higher than those of centrifugal units Sentence is too long, please supply a shorter sentence.