The text is about the study of the extraction of gold from electronic wastes and its benefit.

本文主要是关于电子废弃物提金技术的研究及其效益分析的探讨。

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Extensive attentions have been attracted to the extraction of gold from refractory gold ore at abroad.

随着金矿的普遍开采应用，从难浸金矿石中提取金越来越引起国内外的广泛重视。

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The paper introduces extraction of gold from alloy waste, and the application technique of purification of gold to 99. 99% purity.

本文介绍从含金废料中提取金，并可提纯至含金量为99.99%的应用技术。

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As Peter recently explained, this deduction of 15% of gross income from oil, gas, silver and gold extraction, can be applied creatively and cumulatively on the yearly gross returns from a mine or well.

FORBES: Connect