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H1H2H3H4H2H4H3H1H2H4H3H1H2H4H3H1零线零线aaaaaaaabbc1.填方四棱柱体; T=a(H1+H2+H3+H4)/4挖方四棱柱体:W=a(H2+H2+H3+H4)/4梯形棱体; T=(b+c)(H3+H4)/8w=(2a-b-c)(H1+H2)/84.五棱体.三棱体; T=(a2-bc)(H1+H2+H4)/5 W=bcH3/3c方格网土方算量计算公式22