GB/T 3639 45 Seamless cold-drawn or cold-rolled steel gb t q235a c beam
GB/T 3639 45 Seamless cold-drawn or cold-rolled steel tubes for precision applications, Precision Steel Tube, Power Steering, HPL Tube, Steel tubes for precision applications Part 1 Seamless cold drawn tubes, cold drawn seamless steel tubing, DIN-2391 sheet 2 steel grade st45 cond. nbk, AMG-69107, IU 920004, steel tube for safety system, steel tube for shock absorber, steel tube for steering gb t q235a c beam
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steel 0 35mm sheet price