热轧扁钢的理论重量扁钢加工加入时间：2009-6-3012:00:21点击：80热轧扁钢的理论重量规格长度理论重量宽度厚度m(kg/m)103456783--90.240.310.390.470.550.63123456783--90.280.380.470.570.660.75143456783--90.330.440.550.660.770.88163456789103--90.380.500.630.750.881.001...

时间:2024-04-17 14:09栏目:教案课件