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海军炮铜
met. admiralty gun metal (88Cu, 10Sn,2Zn); government bronze (87 〜 89Cu, 9.5-10.5Sn, 1.5-2.5Zn); admiralty metal
tech. admiralty gun metal
海军炮 铜 88%,锡 10%,锌 2%
met. admiralty gunmetal