| 摘要 |
The coupling structure has a coupling plug (30) which is provided with a check valve (15,35) in the decoupled state. The check valve is connected with a coupling socket (10) and coupling plug which are arranged in flow-opening for sealing against the ingress of ambient air, when connected check valve is opened automatically. Coupling socket is connected with front portion (11) of coupling plug fixedly and rear portion (12) of check valve (15) releasably, by exerting predetermined tension to the rear portion. |
