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SOTOwasfoundedinBeijingin1998bytwoscientists:adoctorinclinicalmedicineandamasterinphysics.Withtheirknowledgeinmedicineandscience,theyledateamofyoungpeopleanddedicatedthemselvesintodevelopinghighqualitymedical-gradeairpurificationsystems.Afteryearsofcontinuousresearchandtesting,SOTOhasbecometheleadingmanufacturerinmedicalairpurificationsystems.