Can I buy a used oxygen concentrator? The first thing you need to do is to get a good deal on a new one.

Don't buy a second-hand, you know that he is not the real thing ah, even if there is an invoice and how ah, this social fake more, or to go to the regular store to buy, after-sales and quality are guaranteed, choose the machine should also be based on the different circumstances of the people, suitable for the oxygen generator is also not the same, there is a family of specialty stores, people are very professional, that get people to be a medical student, in this area know very well very professional, don't just buy one! The second-hand 0571- bar 陆 扒 O O 柒三 叁