... torque 4 rather durable 5 broad regulation range SJ-A High and low-density blowing film machineSuitable Material: HDPE, LDPE, LLDPE the ... machine body is U-Steel frame. and the main machine is collocated with low-center gear box, with advantages of ... alloy steel, after nitrogen treatment, it has high rigidity, good anti-corrosive performance and is rather durable. during heating course, this ...