DSAW Steel pipe ndepụta ọnụ ahịa Stangdard: GB/T3091, ihe onwunwe:Q235B; WT OD 406.00 457 508 609.6 711.1 762 812.8 863.6 914.4 1016 11117.21 11217.2 11217.2 11217.2 11217.2 11217.2 11217. 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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