实践证明，拖网分离栅能够有效地提高拖网作业的选择性，降低副渔获物和抛弃，保护渔业资源，因此，许多国家通过立法使其被强制使用。
Trawl sorting grids can effectively enhance the selectivity of trawl, reduce by-catch and discards, protect fish resources, which are compulsively used in many countries by legislation.
反弯则使得叶栅内分离趋势增加，气动性能明显降低。
A negative bowed blade increases the flow separation and the flow performance is reduced remarkably.
通过数值模拟，分析了叶片周向弯曲对大折转角压气机叶栅内分离结构的影响。
A numerical simulation was performed to analyze the effect of bowed blades on the separation structures in a high-turning compressor cascade.
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