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发表于 2009-6-7 10:51:50
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来自： 中国北京
bs en 1092-1: 2002 flanges and their joints - circular flangers for pipes... [& {: a, }! A6 u0 g
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flanges and their joints - circular flangers for pipes,
% }4 o& L- m) H8 i8 x1 V. e- Bvalves , fittings and accessories,PN designated-8 K) \, j* \ t' G. j8 E6 I
part 1 steel flanges
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