[KongchangAI]
Unverified75% confidenceFactTime unknown

电镀层厚度决定是否褪色:镀金层≥0.5微米(0.5μm)日常佩戴可维持1-2年不掉色,闪购廉价胸针多为0.1μm以下,几周即露底色

1
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75%
Confidence
Long-term
Relevance
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