(3) The surface is painted, but the surface is not painted without treatment. After the pitted surface is completely wetted by water, the pitted surface shall be leveled with the original mixing ratio of concrete and gravel mortar. The main effect of rolling on the pitted surface is beautiful and should be repaired. After a short period of time, the surface of the pits should be soaked with water and smoothed with mud or cement mortar. If it is a small honeycomb, it can be washed with clean water and then repaired with 1:2 or 2:5 cement mortar; if it is a large honeycomb, first pick out the less crowded gravel, soak in the water after washing, and then use the fine stone to strengthen the mark The concrete is compacted to strengthen the maintenance.