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consistent diagonal size, the tile is positive; depends on the flatness of the tile then the most simple and effective way is to use the same brand of overlapping two sheets of the positive and negative tiles, as will be overlap between the two tiles there are obvious gaps or can be rotated, the tiles uneven; there is no color tiles last look at the method is to take a few pieces of the same type of tile samples, were compared in the light, as do not see color differences can be ordered. b, the tiles after a good can not have the whole piece of brick hollowing (partial hollowing can not exceed 20% of the whole piece of brick), if the entire piece of brick hollowing require rework, generally under normal circumstances, posted 100 per brick, brick wall tiles are allowed to have a hollowing, brick tiles are allowed to have two hollowing, but must rework, rework the main material (already

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