人行道铺设时,沙下面为什么铺水泥我现在居住在常德,最近这边很多人行道在铺设,顺序是先在下面铺一层水泥,然后铺一层沙子,再在上面铺砖.这是为什么?这样水泥铺在下面,不但不能使雨水
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/02 08:00:54
![人行道铺设时,沙下面为什么铺水泥我现在居住在常德,最近这边很多人行道在铺设,顺序是先在下面铺一层水泥,然后铺一层沙子,再在上面铺砖.这是为什么?这样水泥铺在下面,不但不能使雨水](/uploads/image/z/12089452-4-2.jpg?t=%E4%BA%BA%E8%A1%8C%E9%81%93%E9%93%BA%E8%AE%BE%E6%97%B6%2C%E6%B2%99%E4%B8%8B%E9%9D%A2%E4%B8%BA%E4%BB%80%E4%B9%88%E9%93%BA%E6%B0%B4%E6%B3%A5%E6%88%91%E7%8E%B0%E5%9C%A8%E5%B1%85%E4%BD%8F%E5%9C%A8%E5%B8%B8%E5%BE%B7%2C%E6%9C%80%E8%BF%91%E8%BF%99%E8%BE%B9%E5%BE%88%E5%A4%9A%E4%BA%BA%E8%A1%8C%E9%81%93%E5%9C%A8%E9%93%BA%E8%AE%BE%2C%E9%A1%BA%E5%BA%8F%E6%98%AF%E5%85%88%E5%9C%A8%E4%B8%8B%E9%9D%A2%E9%93%BA%E4%B8%80%E5%B1%82%E6%B0%B4%E6%B3%A5%2C%E7%84%B6%E5%90%8E%E9%93%BA%E4%B8%80%E5%B1%82%E6%B2%99%E5%AD%90%2C%E5%86%8D%E5%9C%A8%E4%B8%8A%E9%9D%A2%E9%93%BA%E7%A0%96.%E8%BF%99%E6%98%AF%E4%B8%BA%E4%BB%80%E4%B9%88%3F%E8%BF%99%E6%A0%B7%E6%B0%B4%E6%B3%A5%E9%93%BA%E5%9C%A8%E4%B8%8B%E9%9D%A2%2C%E4%B8%8D%E4%BD%86%E4%B8%8D%E8%83%BD%E4%BD%BF%E9%9B%A8%E6%B0%B4)
xRQr0\Cô0PbLINJCA(1\F+o8oݷn*S@ꨮKJ.'aj3\&4ep35t1p{\&͊T(f@Q+Bl.#1,{Z9m3tr*{|cV!J)$eޢOw*99q@kh`M%C#P>zF|&7,5FrE 3KtWIw&5O@;qR u8E/nO<\7%'z`jyGC(@iRC4P7>@pEm?k4 YhF