Cr5Mo薄壁钢管 38 X 3.5 28000 Cr5Mo薄壁钢管 38 X 4 28000 Cr5Mo薄壁钢管 47 X8 28000 Cr5Mo薄壁钢管 88.9X5.5 24500 Cr5Mo薄壁钢管 89X6 26500 -------------------------------------------------------------------------------------------------------------------------------------