套管 (焊镀锌钢管 无缝 PE 管32 10 D21.3X2.9 D22X3.0 14 dn3250 D33.7X3.2 D32X3.5 dn4065 D42.4X3.6 D38X3.5 dn5065 D48.3X3.6 D45X3.5 dn6380 D60.3X3.6 D57X3.5 dn90100 D76.1X4.0 D76X4.0 dn110125 D88.9X4.0 D89X4.0 dn160150 D114.3X4.0 D108X4.0 dn200150 D139.7X4.0 D133X4.0 (4.5) dn250200 D168.3X6.3 D159X6.0 dn315219.1X6.3 (7.1) D219X6.0(7.0) dn355D273.1X7.1 (7.92) D273X7.0(8.0) dn450D323.9X D325X8.0D355.6X D355X9.0D406.4XD457X8.7尺寸 mmDN200*150 140DN250*150 160