Unverified80% confidenceSolutionTime unknown
旧缝翻新美缝要先把原填缝剂/水泥缝清理干净并干燥，直接覆盖在潮湿或松动的老缝上会导致附着不牢、后期整片脱落——这是翻新失败最常见原因
1
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80%
Confidence
Long-term
Relevance
-
First Seen
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