In simple words, an Oxygen Concentrator works on electricity; takes in room air, removes Nitrogen from it and provides upto 95% pure Oxygen. The composition of air (78% Nitrogen, 21% Oxygen and 1% other gases like Carbon Dioxide, Argon, etc.) clearly shows that air is mainly comprised of two gases: Nitrogen and Oxygen [together 99%].
Word Origin and History for savoir-faire Expand. n. instinctive knowledge of the right course of action in any circumstance, 1815, from French, literally to know (how) to do, from savoir to know (from Latin sapere; see sapient) + faire (from Latin facere; see factitious).
GR IR Clearing Process SAP. The GR IR account is an intermediary clearing account in SAP for goods and invoices in transit. It is commonly referred to as the GRIR (Goods Receipt Invoice Receipt) or GRNI (Goods Received Not Invoiced) account. Both mean the same thing.