In view of the resistance and propulsion, the load water line, shape of sections, half Angle of entrance, forms of tunnel and their effect on propeller were analysed and compared.

根据我国航道条件就现有浅水拖输艏艉线型形状进行了探讨，从阻力和推进观点出发对满载水线、横剖面形状、半进水角和各种坠洞以及它们对螺旋桨的影响等加以分析、比较。

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The long shallow slope on the main roof at the entrance is inspired by the angle of repose of the local soil.

入口主屋顶上长长的斜坡受到当地土壤的自然倾角的启发。

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This paper is focused on the analysis of three nozzles with different entrance shrinking Angle with FEM method.

文中运用有限元法对三种不同入口收缩角的喷嘴进行了分析。

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