Double-head Film Blowing Machine Set 1.high quality alloy steel 2. ... operation. 4. Save electricity.Feature:1. The full set machine is made of twosets main motors, two cylinders ... hardness and corrosion resistance.,Scientifically designed,this machine set has two heads for one extruder with such ... ,labour and workshop area,etc.use:This machine set is used for blowing Low-density polyethylene(LDPE) ...