| 摘要 |
The lamellae (1) are each supported at both ends on pins (2) between a first bearing support (3) and a second bearing support (4) parallel to the first. A manoeuvring component (7,8) is used to push all the lamellae between a closed first position and an open second position. A second manoeuvring component (11) is used to push the lamellae together in the open second position. |
