ICS77.140.50CCSH46中华人民共和国国家标准GB/T31938—2026代替GB/T31938—2015,GB/T33971—2017矿粉矿浆输送管用钢板和钢带Steelplate,she...
中华人民共和国国家标准ICS77.140.50CCSH46GB/T21237—2026石油天然气输送管用宽厚钢板Wideandheavyplateforlinepipeofpetroleumandnatural...
ICS77.140.50CCSH46中华人民共和国国家标准GB/T14164—2026代替GB/T14164—2013石油天然气输送管用热轧宽钢带Hotrolledwidestripforlinepip...
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Ics91.120.30Q14备案号:15216-2005ic中华人民共和国建材行业标准JC/T946-2005混凝土和钢筋混凝土排水管用橡胶密封圈Rubbergasketringofconc...
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