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Company Profile: Dandong Huayu Instrument Co., Ltd. is a professional manufacturer of average particle size tester. The average particle size tester is generally known internationally; Fisher apparatus; (Fsss), also known as Fisher's ultra-fine screen. The company has a strong technical force, and is already engaged in; Fisher method; The test technology research has been carried out for decades by the older generation of senior engineers, as well as by young modern scientific and technological personnel in their prime. The combination of old, middle and young technical forces has made our factory's Fisher test technology and test instrument manufacturing always stand at the forefront of the national Fisher test technology. The company holds the manufacturing measuring instrument license issued by Dandong Municipal Bureau of Quality and Technical Supervision. The average particle size tester produced by the company has won the second prize of scientific research achievements and passed..