... laying etc.Tin set is composed of the conical twin-screw extruder,vacuum forming table,dragger,cutter,stiring up ... and cooling machine,plastic power charger,conical double screw plastic extruder,(single screw extruder)handpiece,double-wall accordion pipe shaper,plastic pipe- ... 51/105 or SJZ65/1321 cone double-screw-stem extruder,is equipped with double-tube single-control stainless steel spraying ...