Compressors from 5HP to 50HP, 2~6 compressor to be shunt-wounded Save investment, to reduce first-time equipment investment;Save power, supply ref. capacity according to need, can ... of the unit;Separately equipped oil level controller, efficiently proof compressors from oil metamorphoses pollution; Compressors from 5HP to 50HP, 2~6 compressor to be shunt-wounded