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Yantai Volm Vacuum Technology Co., Ltd.Officially registered in 2002, specializing in productionWater ring vacuum pump、Dry screw vacuum pump,、Roots vacuum pump andVacuum unit_Vacuum system complete sets of equipment, products are widely used in pharmaceutical, fine chemical, sugar, alcohol, sewage treatment and other dozens of industries, through more than 20 years of development and growth, has become an influential set in the industryVacuum pump supplier,。