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SIERRA 50-400HP oil-free screw compressor

SIERRA 50-400HP oil-free screw compressors for us to ensure that we sold oil-free screw air compressor will maintain optimum operating performance is a challenge. After a long study, Ingersoll found that poor rotor coating will fall off after a period of operation, the rotor is exposed to air, exposed to impurities in the air and humidity changes. Ultimately, the resulting reduction in operating performance, or even damage the machine.


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