Concentrators need refilling with oxygen every month. Posted byAnonymous January 7, 2025 Questions Cоncentrаtоrs need refilling with оxygen every month. Show Answer Hide Answer Tags: Accounting, Basic, qmb, Post navigation Previous Post Previous post: Can a patient at the end of life experience dyspnea without…Next Post Next post: How many moles of iron are contained in 1.75 kg of iron?