دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the part of a breathing medium, such as helium, that serves as a transport for oxygen and is DOl used by the body as a life-support agent. Its purpose is to dilute the flow of oxygen to the lungs, thereby preventing oxygen toxicity. 2. in chemistry, gases that have a fined outer electron shell and thus do DOl easily react with other substances. Examples are helium, argon, neon, and xenon.