Petroleum industry . lead seals and lead seal cupels 石油工业.铅和铅封件
2.
We assayed in a cupel 我们在灰皿中化验。
3.
Standard practice for silver corrections in metal bearing ores , concentrates , and related metallurgical materials by fire assay slag recycling and cupel proof gravimetry 通过燃烧试验熔渣再利用和灰皿验证重量测定法修正含金属矿精矿和相关冶金材料中的银值的标准规程
4.
Standard practice for fire assay silver corrections in analysis of metal bearing ores , concentrates , and related metallurgical materials by silver determination in slags and cupels 用炉渣和灰吹盘中的银测定法在含金属矿物浓缩物及相关冶金材料的分析中测定火试金法银修正值的标准实施规范
