Because the three parts trawl board, trawl and trawler are an integrity in trawl fishing, it is necessary to work out a mechanical calculation of the match.
由于在生产作业中网板、拖网和拖网船是一个整体，进行三者配合的力学计算是十分必要的。
Because the three parts trawl board, trawl and trawler are an integrity in trawl fishing, it is necessary to work out a mechanical calculation of the match.
由于在生产作业中网板、拖网和拖网船是一个整体，进行三者配合的力学计算是十分必要的。
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