oceanic trade

Based on collected data of more than handred exist ships for deep sea trawlers, the main parameters are analysed.

在收集大型远洋拖网渔船百余艘实船资料的基础上，对其主要参数进行了分析，探索了它们之间的关系，得出了一些近似公式，可用于设计工作中，也可作为船型论证的基础。

Production of large-scale pelagic ship rudder horn is difficult by casting method because of its complex shape,heaver weight,high inside quality requirement.

大型出口远洋货轮挂舵臂铸钢件重量大,形状复杂,内部质量要求高,生产难度大。