proof corrections 中文意思是什麼
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Standard practice for silver corrections in metal bearing ores, concentrates, and related metallurgical materials by fire assay slag recycling and cupel proof gravimetry
通過燃燒試驗熔渣再利用和灰皿驗證重量測定法修正含金屬礦精礦和相關冶金材料中的銀值的標準規程 -
Standard practice for proof silver corrections in metal bearing ores, concentrates and related materials by fire assay gravimetry
用火試金重量分析法驗證含金屬礦物濃縮物及相關材料中銀修正值的標準實施規范
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