Making use of field experiment, bottom plow is designed and improved.
利用田间试验试制、改进并验证了犁体。
Within hours the plankton run out, the feast winds down, and the mantas plow the bay's sandy bottom with their cephalic fins to throw hidden prey back into the water column.
在几个小时内浮游生物的盛宴即将结束，而蝠鲼犁其头鳍于海湾的沙底中，等待下一批猎物的到来。
This paper proposes an optimal method for plow bottom moldboard design by taking the power consumption of the objective and the feasible region of the geometric parameters for boundary constraints.
本文提出了以功率消耗为目标函数、犁面几何参数的可行范围为约束条件的犁面优化设计方法。
Based on this foundation, basic models of plow-bottom surface are ruled surface and negative constant curvature surface.
据此得出直纹和负常曲率两类曲面可作为犁体曲面的基本模型。
This paper tries to provide a new method of the plow bottom surface design by a mathematical method.
本文试图为犁体曲面的设计提供一种新的设计方法——用数学的方法设计犁体曲面。
In the design of plow bottom surface formed by horizontal straight-line elements, it is important to determine the shape and parameters of guiding curve.
在设计水平直元线犁体曲面时，确定其导曲线的形状和参数是重要的一环。
The plow bottom performance and surface analyses in this paper, will be a reference for high speed plow bottom design and research works.
本文阐述的犁体性能与曲面分析，可供高速犁体设计研究参考。
This method can be applied to similar combination surfaces of mouldboard plow bottom as well.
这种方法也可应用于其他的组合曲面。
This method can be applied to similar combination surfaces of mouldboard plow bottom as well.
这种方法也可应用于其他的组合曲面。
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