Gaotang Zhengyou Precision Machinery Co., Ltd., is owned south korea investment.specialized in producing granite inspection surface plate , measuring tools and granite mechanical components of the standardized company, The factory covers an area of ? 20,000 square meters, is equipped with machining, precision Constant temperature processing, maintenance, measuring and testing, such as workshops, with a total area of ??5,000 square meters. The company is well found in machining equipment and equipped with such advanced testing instruments as electronic level so as to realize the computer data processing.it has a lot of excellent employees with high quality.