发布时间:2025-01-30 23:16:19
按颜色为白色,数量有个几百平方,那么50*100mm的铝方通0.6mm厚是10.5元一米,0.7mm厚是11.5元一米。按面积计算,大概是70~100元/平
pkpm坡屋面建模虚梁与下一层的梁重合虚梁上的荷载会传到下一层的梁上吗
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