The new preparation method of Al-Ti-C grain refiner was studied with aluminium ingot,potassium hexafluorotitanate,aluminium powder,hexachloroethane and carbon powder.
During the decades when the Aluminum Company of America (Alcoa) was the only producer of virgin ingot aluminum in the United States, its annual profit rate on its investment was about 10 percent after taxes.
机，有一个铝锭预热箱，预热箱长度接近
个配料跨。
、
乙烷和碳
业公司（Alcoa）作为美
几十
间，其投资
战
