| 摘要 |
<p>The system has a chassis-case displaced entirely on its length of a sports ground i.e. football ground, while folding and unfolding a translucent protecting cover (2) by using a folding and unfolding mechanism, where the cover serves as an advertising medium. The chassis-case is connected to a network of cables (3) that is deployed on the sports ground. The network of cables is driven by motorized pulleys (4) for ensuring displacement of the chassis-case on the sports ground.</p> |
