تعدين المعرفة Marefa

متالورجيا استخلاصيةصناعة التعدينالأرقام القياسيةThe science of extractive metallurgy is a specialized area in the science of metallurgy that studies the extraction of valuable metals and minerals from their ores, especially through chemical or mechanical means. Mineral processing (or mineral dressing) is a specialized area in the science of metallurgy that studies the mechanical means of crushin...