作者: Robert J. LeFevre
DOI:
关键词: Valve guide 、 Needle valve 、 Globe valve 、 Mechanical engineering 、 Safety shutoff valve 、 Butterfly valve 、 Structural engineering 、 Geology 、 Ball valve 、 Plug valve 、 Angle seat piston valve
摘要: A dual valve assembly for intravenous infusions from multiple parenteral fluid sources, the controlling both forward and reverse flow through a line includes normally seated first second valves mounted movement toward away respective seats to control in direction, one of said being opened response opening other including seat movable into closing relationship on its thus prevent assembly.