... color.USAGE:For tantalum metal billets and powder, tantalum carbide, ceramic capacitors and additive in special optical glass.PACKING ... same time, the company combined with modern management and marketing principles, cultivate a high quality, efficient management ... neodymium, metal praseodymium, Pr-Nd alloy, praseodymium, neodymium and dysprosium alloys, metal lanthanum, low iron, low magnesium mixed ...