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CE Approved Portable Medical Oxygen Concentrator 5Lpm@90% Home & Hospital Use Improve Health Condition Oxygen Supplying Machine Welcome to our store, we promise : 1. Best : our products quality are the best compared with other products at the same level; 2. Shortest : we will prepare your order in shortest time ; 3. Fastest : we will delivery your order by fastest transportation . Working Principle: Its working principle is the basis of PSA, which is the most advanced oxygen making technology at present. Firstly, air is compressed into the oxygen making con so lidation through air intake filter and compressor; Secondly, oxygen and nitrogen are separated by zeolite in the oxygen making con so lidation because of their different size of molecular; Thirdly, nitrogen is discharged and pure oxygen is collected; Fourthly, oxygen flows out through bacterial fi
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