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网板能使网水平扩张,且使网保持在目标深度上,它对捕捞作业的渔获量产生巨大的影响。有效的网板能节省燃油和提高捕鱼效率,在拖网渔具中起着最重要的作用。所以,在研究渔具中设计高效型网板是重要的。在过去的几十年中,已经使用许多类型的网板,例如,小展弦比矩型网板、椭圆曲面型网板、V 型网板、立式 V 型网板、大展弦比短型网板和多平面网板,也试验了帆布扩张装置(结附于拖网网袖上来扩张网口)。近
Stencils expand the network horizontally and keep the net at target depth, which has a huge impact on the catch of fishing operations. Effective stencils save fuel and improve fishing efficiency and play the most important role in trawling gear. Therefore, it is important to design efficient stencils in research gear. In the past few decades, many types of stencils have been used, for example, small aspect ratio stencil, elliptical stencil, V-stencil, vertical V-stencil, large aspect ratio Type stencil and multi-stencil stencil, also tested the canvas dilator (attached to the trawl sleeve to expand the mesh opening). near