... 4.Test before delive single screw extruder for PPR plastic pipe Model SJ45/30 SJ65/33 SJ75/ ... 2) It adopt special gearbox,and has features of low noisy,stable running,high capacity,long service life ... different mold and auxiliary equipments,it could produce plastic pipe,sheet,board granules and so on.(3) ... It has features of simple process,high output,stable extrusion presure,and ...