Qingdao Miller & Englehardt Co., Ltd., created in July, 2012, mainly sells the chemical powder for metallurgy industry invented by Richard H. Haupt. Mr. Haupt, born in America, 86 years old (till year 2012), engages in brass permanent molding industry in all his life till now. He discovered several metallurgical chemical powders. Among them, I75L mold-release agent was invented in year 1976 while Desofin grain refiner was invented in year 1982. These inventions converges his valuable practice ...