| 摘要 |
<p>The teaching aid simulates the handling of a wind surfing board. It produces a side rolling action and complete rotation of the board under wind action imitating the behaviour of a wind surfing board. The device uses a system of rubber springs and an assembly of rollers guided in a circular path. It consists of a fixed base (6), and a moving board (1) which can make simultaneous rocking and rotating movements. The board is convex and has reinforcements for oscillation and rotation.</p> |
