聚碳酸脂（PC）挤出管材； Φ4,5,6,7,8,9,10,11,12,,13,14,15,16,18,19,20,21,22,23,24,25,26,28,30,31, 32,33,35,38,40,42,45,50,55,60,63，65,70,73,75,80,82,85,90,95,97,100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,180,190,200