دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a mechanical fluid-measuring device that IDeasmes by filling and emptying chambers of a specific volume. The displacement of a fixed volume of fluid may be accomplished by the action of reciprocating or oscillating pis- tons, rotating vanes or buckets, nutating disks, or tanks or other vessels that automatically fill and empty. Also called a volume meter or volumeter.