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The floor tile joint wants thickly thin consistent, alines with the wall brickwork joint.
地砖接缝要粗细一致, 与墙砖缝对齐.
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binding mortar: thermal insulation binding mortar, ceramic tile binding mortar, joint mixture, etc.
粘结砂浆：保温隔热粘接，瓷砖粘接，填缝剂等；
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