二、有缝钢管
分类：电气设备安装工实际操作1745字
有缝钢管(黑、白铁管) 的规格见表2-37。
表2-37 有缝钢管(黑、白铁管)的规格
标称直径外径
(mm)内径
(mm)壁厚
(mm)质量
(kg/m)(mm)(in)103/81712.52.250.82151/221.2515.752.751.25203/426.7521.252.751.6325133.5273.252.4232
标称直径外径
(mm)内径
(mm)壁厚
(mm)质量
(kg/m)(mm)(in)103/81712.52.250.82151/221.2515.752.751.25203/426.7521.252.751.6325133.5273.252.4232 42.2535.753.253.1340 48413.503.8450260533.504.8870 75.5683.756.6480388.580.54.008.3410041141064.0010.8512551401314.5015.0415061651564.5017.81
42.2535.753.253.1340标称直径外径
(mm)内径
(mm)壁厚
(mm)质量
(kg/m)(mm)(in)103/81712.52.250.82151/221.2515.752.751.25203/426.7521.252.751.6325133.5273.252.4232 42.2535.753.253.1340 48413.503.8450260533.504.8870 75.5683.756.6480388.580.54.008.341004 ...... （共1745字） [阅读本文]>>
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