| 摘要 |
The bellows structure comprises a rigid container (7) enclosing bellows (6), one end of which is fastened to one end of the container and is connected to a respiratory circuit, while the container is connected to a propellant gas source. The other mobile bellows end (13) is provided with a control element (14) which is connected to the container such that, during expansion and compression of the bellows, the mobile end always moves parallel along the central axis (17) of the bellows. |
