pvc管规格型号尺寸对照表(pvc管规格型号尺寸对照表图片) pvc扁管规格表尺寸?pvc管厚度有几个规格?pvc管怎么看几寸的?pvc管尺寸规格外径70?pvc扁管规格表尺寸? 常用的PVC扁排水管的常规规格如下:公称外径分别为:32mm,40mm,50mm,75mm,90mm,110mm,125mm,160mm,180,200mm,250mm,315mm...