| 摘要 |
<p>The bushing (1) has a channel (2) comprising an outer side-end (21) and an inner side-end (22), and a flap or lamella arranged in the channel. An operating device operates the flap or lamella. A bypass-opening (91b) comprises a bypass-closing device i.e. bypass-flap (91), is formed at an inner side-end-section (4) of the channel. The operating device is mechanically coupled with the bypass flap. The bypass flap is opened or closed when the flap or lamella is opened or closed. The operating device is mechanically coupled with the flap or lamella over a rod.</p> |
