16mm 25mm 38mm 50mmPP 鲍尔环

25mm 38mm 50mm 76mmPP RPP CPVC PE 矩鞍环填料

50mm 76mm 100mmPP RPP 海尔环填料

25mm 51mm 73mm 95mm聚丙烯花环

50mm 76mm 100mm海尔环

16mm 25mm 38mm 50mmPP阶梯环 RPP优质阶梯环

25mm 38mm 50mm 76mm聚丙烯高流环、改型鲍尔环

25mm 38mm 50mm 76mm聚丙烯多面空心球填料

16mm 25mm 38mm 50mm增强聚丙烯鲍尔环 鲍尔环填料