| 摘要 |
<p>The side loops (5) are of a modified U-shape, with the open ends of the U-shapes fastened to pivot blocks on the ends of a transverse shaft (7). The shaft rotates in a support tube (8) with a square cross-section and a circular bore. A lever plate (13) is fixed to the shaft and is rotated by gas springs (9,40). The top ends of the springs are pivoted (12) to the lever plate and the bottom ends are pivoted (11) to a fixed holder plate on a holder arm (29). There is a holder arm on either side of the seat.</p> |
