| 摘要 |
<p>The invention relates to the manufacturing of a floating element for watercrafts and life-preserving devices. According to the invention, the floating element uses elastic expanded polystyrene or polyurethane foam instead of air. Said materials fill the free spaces (7) of some structures (18) of watercrafts or of some life-preserving devices (12, 13 and 15).</p> |
