[KongchangAI]
Unverified86% confidenceFactTime unknown

美缝剂本身褪色发黄(非污渍)用清洁剂无法还原,含氯产品可漂白表面浮霉但恢复不了褪色的基材;若擦洗后仍暗黄说明美缝剂已老化氧化,只能铲除重做美缝

1
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86%
Confidence
Long-term
Relevance
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