| 摘要 |
<p>The device has a mobile platform (3) rotating with respect to a frame. The platform and the frame have four sides defining a rectangle, cross-pieces (10, 20) arranged at respective diagonals of the rectangle, and central zones (12, 22) arranged at an intersection between the cross-pieces. A locking unit comprises linear actuators (23), where each actuator comprises ends (24, 25). One of the ends is attached with the frame on one of the central zones, and another end is attached with the platform at the cross-pieces in a distal zone (32) opposed to another central zone.</p> |
