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GEMSTONE is a multinational group company dedicated to technical research and production of advanced materials. We have 4 manufacture bases in mainland of China and a wide variety of alumina products are developed such as microcrystal grinding medias(balls and linings), high ...
Shandong Maifeng (Taian) New Material Technology Co., Ltd. is a high-tech company situated in the High-tech Industrial Park in Feicheng, China, and specializes in R&D and production of the mid-range and high-end abrasive and polishing new material. The company has set foot in ...