发布时间:2025-02-07 01:46:40
因为按1:0.5放坡,所以放坡为3米,放坡的工程量就为30*2*(根号下6的平方加3的平方)=402.6方
所以总土方量为:20*30*6+402.6=4002.6方
“中山桥”是位于兰州市中心、横跨黄河之上的一座百年老桥.如图1,桥上有五个拱形桥架紧密相联,每个桥
2025-02-07 01:46:40 2025-02-07 01:46:40 2025-02-07 01:46:40 2025-02-07 01:46:40 2025-02-07 01:46:40邻居爷爷希望小区多一些健身设施这样老人晨练就更方便了你有什么好主意和大家
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