废旧镍镉电池中含有大量的有价值金属和物质。据估计，全球每年镍镉电池的生产量为60000吨，因此而消耗掉7000吨以上的镉。
It is estimated that more than 7000 tons of Cadmium is used to produce 60000 tons Ni-Cd batteries every year all over the world.
废旧镍镉电池中含有大量的有价值金属和物质。据估计，全球每年镍镉电池的生产量为60000吨，因此而消耗掉7000吨以上的镉。
It is estimated that more than 7000 tons of Cadmium is used to produce 60000 tons Ni-Cd batteries every year all over the world.
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