A general purpose coupling which can close at either end of the connection.  It is a convenient, compact coupling set which connects and disconnects easily, providing dependable service for fluid transfer of hydraulic, pneumatic, and vacuum systems 

气动快速接头是一种通用联轴节，可在连接的任一端闭合。它是一个方便，紧凑的耦合装置，易于连接和断开，为液压、气动和真空系统的流体输送提供可靠的服务。