Put air though cylinder and make the flange concentric with the valve seat of valve switch.
将气缸通入气源,观察阀门开、关转轴上法兰与轴座之间的钢印对准即可.
The construction of concentric bi-directional valve overcomes the disadvantage of easy to connect between two parallel check valves.
同心双向阀结构克服了传统的单向阀并联结构两阀间易连通的缺点。
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