发布时间:2025-02-01 07:15:35
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
求指点高压线电压与辐射问题新买的房子边上有个高压线铁塔铁塔基距我家20米
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