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astm, en, and bs standard for 304ss

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发表于 2009-9-7 13:47:25 | 显示全部楼层 |阅读模式
astm, en, and bs standard for 304ss
could any tell me the astm, en and bs specification no's for 304ss structral steel (i-beam or h-beam)?
thanks a lot.
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