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bell metal:see bronzebronze,
in metallurgy, alloy of copper, tin, zinc, phosphorus, and sometimes small amounts of other elements. Bronzes are harder than brasses. Most are produced by melting the copper and adding the desired amounts of tin, zinc, and other substances.
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bell metal[′bel ‚med·əl]
An alloy of copper and tin, containing 15-25% tin but 20-24% for best tonal quality.