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。
Carry out surface preparation by grinder and dust free self-enclosed portable grinder until to remove surface laitance and provide sound and textured surface.
使用地坪打磨机和无尘封闭手提磨机去除表面粗糙物，并提供涂装对表面所要求的粗糙度。
Carry out surface preparation by grinder and dust free self-enclosed portable grinder until to remove surface laitance and provide sound and textured surface.
使用地坪打磨机和无尘封闭手提磨机去除表面粗糙物，并提供涂装对表面所要求的粗糙度。
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