发布时间:2025-01-20 02:57:30
钢筋: (300*4/1000)+(1.5*4/1000)=3.6吨
混凝土:(300*4*1.2/10000米)+(1.5*4/10000米)=3.84吨
(300*4+1.5*4)*25kg/㎡=30.0吨
石头:30吨
沙子: 7.5 吨
想在俄罗斯开木材加工131206做进口木材生意运往国内销售前景好吗
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