... . the purity reach 95% 3. health care machine Mini portable oxygen concentrator General IntroductionApplicants: Medical agent, Family, etc product ... .Structure feature and Work theoryThe structure combines Mainframe, flow meter, wet bottle.Plastic box, safeCalculate use time, very ... of Oxygen ProduceThe machine adopts the AC220V electricity as source energy, the air as raw material, with the good ...