薄壁吉多瑞钒钢31C rV3,镀铬 编码编号 截面宽度 La1 a2 b1 b2 647004030411*13 150 7 7.517 20.56470630304 13*151858.5 8.520.523647012030413*171858.5 8.520.525.5647020030414*161858.5 8.521.524.5647039030414*171858.5 8.521.525.56470470 30415*171858.5 8.52325.5656755030416*181858.5 8.524.5276470550 30419*22 23010 10.52832.56471010 304 7/16*1/2AF15077.51720.56471280 3049/16*5/8AF1858.5 8.521.524.56471360304 5/8*3/4AF2301010.524.5286471440 304 3/4*7/8AF2301010.5 2832.5