DSAW Steel yeeb nkab nqe npe Stangdard: GB/T3091, Khoom siv: Q235B; WT OD 406.00 457 508 609.6 711.1 762 812.8 863.6 914.4 1016 101716.7 2.4 8 721 714 721 707 707 707 707 707 707 707 714 714 9.53 714 700 707 686 686 686 686 686 707 707 707 707 707 757 74 ...
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