| 摘要 |
<p>In order to improve the stability of the doll during skating, the cam 4 causing alternate forward movement of the legs 8 and the feet shod with roller skates acts simultaneously on a vertical lever 13 which imparts a lateral rocking movement to the head 19. The centre of gravity of the doll is thus displaced each time in the direction of the supporting leg. <IMAGE></p> |
