NF A49-645
本文檔由 steeltuber 分享于2010-05-21 14:03
NF A49-645-87 STEEL TUBES ROUND SQUARE AND RECTANGULAR STEELTUBES FOR ORDINARY USES LONGITUDINALLY PRESSUREWELDED AND COLD FORMED FROM COLD ROLLED FLAT PRODUCTS
本文檔由 steeltuber 分享于2010-05-21 14:03
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