| 摘要 |
<p>The driven vessel has a hull with an i.c.-engine driving a screw. The hull has, on its upper face, a movable platform moved between two end positions. It is actuated by the weight of the user to control air intake for the engine, so that when no weight is placed on the platform, the air feed is interrupted. The platform is formed by a plate mounted horizontally on the deck of the hull and movable vertically. This controls a valve against a spring to open the air intake.</p> |
