gold and silver assay 中文意思是什麼
gold and silver assay
解釋
金銀鑒定-
Copper, lead and zinc sulfide concentrates - determination of gold and silver - fire assay gravimetric and flame atomic absorption spectrometric method
銅鉛和硫化鋅精礦.金和銀含量測定.火試金法和火焰原子吸收光譜法
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