| 摘要 |
The device has a flexible membrane (13) which wraps an abutment element in the form of a bead (11) and inserted on hollow surface oriented on the outer surface. The hollow shell (2) is provided with a communication port (14) facing to membrane to enable the breathing gas (7) passage from chamber (3) to intermediate space formed between membrane and the outer surface of hollow shell, and to bypass the abutment element to revert back to inner chamber close to opening. |
