| 摘要 |
The device has a rotatably mounted drum (5) for winding in and reeling out an exhaust hose, and a spring shaft (53). A spring unit (41) drives the shaft adapted to wind in the hose having an inner and outer end. A downshift occurs as the exhaust hose is wound in such that the speed of the spring shaft relative to the outer end of the spring unit is higher than the speed of the drum. |
