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单词 θ209346
释义
society > occupation and work > industry > working with specific materials > working with metal > [noun] > extraction from ore > extraction of silver or gold (3)
cyanide process1890

(a) a method of extracting gold and silver from ores by treatment with a dilute solution of sodium or calcium cyanide (or, formerly, potassium…

cyaniding1894

cyanidation1896

The process of cyaniding gold or silver ores; the extraction of these metals from their ores by means of the cyanide process.

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更新时间:2025/1/12 4:12:05