Unverified82% confidenceDecision RuleTime unknown
判断工艺精细度看爪镶宝石是否有明显缝隙、电镀层是否均匀无色差、焊点是否外露；廉价胸针常见问题是背面焊点粗糙和镀层2-3个月氧化发黑
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