lead-zinc-silverBNC²³⁶²¹³⁺¹ 例句 Introduced a new technology of floatation—Subsection potential- controlled floatation, which improved recovery of lead-zinc-silver sulfide mine, especially to the recovery of silver. 论述了一种新的硫化矿浮选技术——分段电位调控浮选，该技术可以提高铅锌银硫化矿的综合回收效果，尤其是可以提高银的回收率。 www.jsks.net.cn