标准名称:BS EN 1092-2-1997 Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, PN designated. Cast iron flanges
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更新日期:2011年11月13日
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BS EN 1092-2-1997 Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, PN designated. Cast iron flanges
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