发布时间:2025-01-24 05:05:20
比如箱涵,底板混凝土就是指箱体最下面的混凝土,在基础之上。还有比如空心板,底板混凝土指最下面的混凝土,先浇底板混凝土后再将内模放入绑扎钢筋,再浇腹板混凝土和顶板混凝土.
金钱桔种植时比较害怕强光还是湿度过高 金钱桔种植时比较害怕强光金桔树耐阴吗
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