铝 钢 铝 钢 合计 10/2 6/1.50 1/1.50 10.60 1.77 12.37 4.50 2.706 4120 79000 19.1 42.9 3000 16/3 6/1.85 1/1.85 16.13 2.69 18.82 5.55 1.779 6130 79000 19.1 65.2 3000 25/4 6/2.32 1/2.32 25.36 4.23 29.59 6.96 1.131 9290 79000 19.1 102.6 3000 35/6 6/2.72 1/2.72 34.86 5.81 40.67 8.16 0.8230 12630 79000 19.1 141.0 3000 50/8 6/3.20 1/3.20 48.25 8.04 56.29 9.60 0.5946 16870 79000 19.1 195.1 2000 50/30 12/2.32 7/2