... product line. At present, SAINT GOBAIN (Processing partner of SGH), CSG HOLDING, FUYAO Group, XINYI GLASS HOLDING LIMITED ... Indonesia, Belgium, Australia, Turkey, USA, South Africa, Poland, Iraq. Czech, The United States, CanadaCompany IntroductionEstablished in 1998, Zhengzhou Longda ... engages in the research, production and sales of various kinds of top-class polishing tools which keep ahead in ...