发布时间:2025-02-07 04:22:48
在斜坡楼顶做支架,支架的支腿不一样长,靠坡顶部短,靠坡下方长,支架顶部则保持水平就可以放水塔了。
一个圆柱形水池水池内壁和底面都要壤上瓷砖水池底面直径6米池深12米壤瓷砖的面积是多少平方米
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