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：2025/11/30
calamine brass
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Brass produced by a particular alloying technique using the zinc ore calamine directly, rather than first refining it to metallic zinc.
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calamine brass
The conservation team identified a crack in the antique calamine brass clock and proposed a restoration plan to preserve its historical patina.
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The conservation team identified a crack in the antique calamine brass clock and proposed a restoration plan to preserve its historical patina.
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