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从含有化合银的废水中提出白银,这已是无可争议的事实。但是,怎样才能用最小的投资最大量地提出白银,且使提银过程更加简便快捷、没有污染。这就是内功了——
It is an undisputable fact that silver is proposed from wastewaters containing compound silver. However, how to present the largest amount of silver with minimal investment and make the process of raising silver easier and faster without pollution. This is the internal strength -