Unverified85% confidenceDecision RuleTime unknown
景泰蓝（掐丝珐琅）看铜胎厚度和掐丝密度：优质品掐丝均匀无断丝、砂眼数量少于3个/平方厘米、镀金层不露铜。手工掐丝纹样弯曲流畅，机器压丝则线条呆板对称
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85%
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