The design of extrusion complex die on unplasticized PVC pipes is presented.With thedie preesure decrease in theory calculated during extursion applied scope of the die is verified.in this paper.是什么意思_The design of extrusion complex die on unplasticized PVC pipes is presented.With thedie preesure decrease in theory calculated during extursion applied scope of the die is verified.in this paper.在线翻译_英语_读音_用法_例句