actinide element
... actinicrays光化射线 actinide铜系元素 actinideelement铜系元素 ...
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... actinide 铜系元素 actinide element 铜系元素 actinide elements 锕系元素 ...
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使用火法冶炼的金属锰与铜组成锰基减振合金系，并为改善性能而填加了其他元素。
Damping alloy was composed of smelting manganese and pure copper, some elements were added into the alloy in order to improve its property.
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