The gold recovery can be increased from 36.5% to 94.3% by pretreating refractory gold concentrates by acidic hot-press oxidation process.是什么意思_The gold recovery can be increased from 36.5% to 94.3% by pretreating refractory gold concentrates by acidic hot-press oxidation process.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句