... and construction water supply and drainage, overhead or underground wire and cable. Due to the special characteristics ... ) double-screw extruder, vacuum sizing platform, tractor, cutting machine, stacker, etc. The conical (parallel) double-screw extruder ... main technique parameter Parameter\ModelSJPGZ-250SJPGZ-400SJPGZ-630Main machine modelSJZ-65SJZ-80SJZ-92Maximum pipe specification(mm)250400630Cooling ...