BS EN 877-1999/A1-2006 建筑物排水用铸铁管和配件及其接头和附件.要求、试验方法和质量保证.pdf PDF 723.46KB 66页 BS EN 1092-1-2007 Flanges and their joints - Circular flanges for pipes valves fittings and accessories PN designated - Part 1 Steel flanges.pdf 未知 T/DASIV 006-2024 核工程用大厚度P91钢管焊条电弧焊焊接工艺规范(英文版).pdf PDF 2.77MB 11页 BS EN 1092-2-1997 Flanges and their joints. Circular flanges for pipes valves fittings and accessories PN designated. Cast iron flanges.pdf 未知
