电池回收计划通常针对按钮和镍镉电池，但由于消费者在识别不同类型的电池的困难可能会收集所有的家用电池。
Battery collection programs typically target button and nickel-cadmium batteries, but may collect all household batteries because of the consumers' difficulty in identifying battery types.
许多国家正在对铜镍的回收技术进行深入的研究。
Many countries are in-depth study of nickel-copper recycling technology.
结果表明，现有工艺流程能较好地回收镍、铜、钴等金属，而贵金属的回收水平有待提高。
The results show that the existing technological flowsheet can well recover nickel, copper and cobalt while the precious metal recovery level remains to be improved.
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