manganese hat
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说明了废旧电池的危害，提出了对废旧干电池中锰粉、碳棒、铜帽、锌皮等可再利用资源的回收利用方法。
The reclaiming and recycling methods of the reusing resources such as manganese powder? Carbon stick? Copper cap and zinc hull in the waste battery are introduced.
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