| 摘要 |
Grippers (10, 11) are fitted manually around an edge (13) of a cover, and the first gripper has a fold (12) which engages under the cover edge. The other gripper locks the first by being turned downwards manually over the inside of the cover. Through the lever being pressed downwards with the aid of a support component whose lower end surface is applied to the side of the over aperture, the opposite end of the cover can be lifted by the grippers. |
