Unverified85% confidenceTradeoffTime unknown
冷铸铜（树脂+铜粉，含铜量通常30%-50%）外观接近青铜但重量仅为纯铜的1/3，适合墙面装饰或大尺寸但预算有限的场景；纯铜铸造（失蜡法）适合收藏级投资，两者价差可达5-10倍
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85%
Confidence
Long-term
Relevance
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