Third generation U type air end Germany CK45 steel,original SKF bearings European leading technology,advanced design concept 5:6 male and female helical rotors High precision 0.02-0.035mm working clearance between rotor gears Large rotors and large bearings to ensure low speed Outstanding durability and long serving life
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Add:No.298 Jinchi Road,Baoshan District,Shanghai China http://www.wen-jian.com.cn