| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high lift otter board having extremely improved net-extending power of a trawl net. <P>SOLUTION: The high lift otter board includes a curved board 2. The curved board 2 is formed into a shape curved in a bent direction corresponding to the spreading direction of a net opening in a towed state, in the direction directing from the front-side terminal parts on the front side in the towed direction in the towed state to the rear-side terminal parts on the rear side in the towed direction in the towed state. At least one of a swelled structure 4 having a swelled face 3, a ceiling plate 5 and a bottom plate 7 is formed in the curved board 2. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
