noun🔗Share逆流The flow of a fluid (through a pipe etc) in a direction opposite to that which is normal or intended."The plumber installed a backflow preventer to stop the dirty water from the drain from causing a backflow into the clean water pipes. "配管工は、排水溝からの汚れた水がきれいな水道管に逆流するのを防ぐために、逆流防止装置を取り付けました。utilitytechnicalsystemdirectionprocessChat with AIVocabulary GamePractice Reading
