petrochemical 简介 our technical experts are over 30 years experience for investment castings and sand castings, in the field of heat resistant stainless steels . By centrifugal casting, we produce various radiant tubes, furnace rolls, sink rolls, stabilizing rolls, reformer tubes , cracker tubes. we know how to optimize the cast process so that the quality be improved. // 产品次级分类显示子分类