... 8-2.0mm8)fragility of nitration:Machinery Manufacture Co., Ltd. is located in Zhoushan ... plastic injection machines, 15-300mm single screw extruders, 30-130mm tapered and parallel double screw extruders, rubber machinery, and petroleum machinery ... plastic injection machines, 15-300mm single screw extruders, 30-130mm tapered and parallel double screw extruders, rubber machinery, ...