In horizontal elements, such as floor slabs, excess water rises and causes a weak laitance layer at the top.

在诸如楼板之类的水平构件中，过剩水分增加会导致顶部的薄弱浆沫层。

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In horizontal elements, such as floor slabs, excess water rises and causes a weak laitance layer at the top.

在诸如楼板之类的水平构件中，过剩水分增加会导致顶部的薄弱浆沫层。

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