美国官员指出，这项政策所包含的九种原材料包括铝土岩、焦炭、萤石、镁、锰、碳化硅、结晶硅、黄磷和锌。
U. S. officials said the nine materials covered by their case were bauxite, coke, fluorspar, magnesium, manganese, silicon carbide, silicon metal, yellow phosphorus and zinc.
简述竖罐炼锌用粘土结合碳化硅砖的生产技术现状，详细介绍了新的生产工艺。
The present technology situation of producing clay-bonded silicon brick for zinc retorting is summarized, and the new process is also introduced in detail.
本发明涉及一种碳化硅颗粒增强型锡银锌复合焊料及其制备方法。
The invention relates to a silicon carbide particle reinforced type tin, silver and zinc composite solder and the preparation method.
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