| 摘要 |
The device has a valve (7) comprising a flexible part (15) equipped with an opening that is normally closed by spontaneous connection of its edges. The part is hollowed and set in a bevel edge oriented towards exterior of a cap (6). The opening is formed of slit provided in an end of the bevel edge and opened under the deformation of beveled walls of the part provoked by air pushed from a cavity (3). The cap is maintained on a body (1) between a vent closing position and a vent releasing position. A vent (5) is provided at a base of the body. |
