Use steel brush or burnished to clean up laitance on the surface of concrete and the concrete surface should keep dry;
用钢丝刷或角磨机清土表面的浮浆层,土表面须干燥;
Use steel brush or burnished to clean up laitance on the surface of concrete and the concrete surface should keep dry;
用钢丝刷或角磨机清土表面的浮浆层,土表面须干燥;
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