This paper describes primarily the results of the research on the combination of stern shape, wake field and propeller rotation direction for a shallow draft full ship model.
本文主要介绍双桨浅吃水肥大船尾型、伴流场与螺旋桨旋向配合研究的主要结果。
By its rotation in water or air, the propeller produces thrust on the Blades, which gives forward motion to the vehicle.
当它在水中或空气中旋转时就对桨叶产生推力，然后推动交通工具前进。
The first part is about the features extraction, including the estimation of source level of the ship-radiated noise and the line extraction of the rotation frequency of propeller noise spectrum.
首先是舰船辐射噪声特征量的提取，包括舰船总声源级的估计和螺旋桨轴频线谱的提取。
Objective To solve the problem that the molar propeller moving upper simultaneously two molars distally resulted in the first molar tipping and lingual rotation.
目的探索解决磨牙推进器同时推两个磨牙远移过程中出现第一磨牙向远中倾斜、舌向扭转问题。
Rotation speed control unit is an important part of underwater heat power propeller system, it directly effects performance of power propeller system.
转速控制单元是水下热动力推进系统的重要组成部分，其直接影响着动力推进系统的性能。
Therefore the distance traveled is not the same, since the propeller is "slipping" behind the theoretical distance it should travel with each rotation.
因此，移动的距离是不一样的，因为推进器的“滑动”背后的理论距离，它应该与每个旋转旅行。
Propeller is designed distinctively, positive rotation for rolling. kneading and knocking, inversion for massage.
浆叶设计独特，正转滚揉摔打、反转按摩。
The utility model discloses an air filter, which relates to the absorption technology of charcoal (9), a rotation shaft (4) is connected with a propeller (2) through a gas pipe (13);
一种空气过滤机，它涉及炭（9）的吸附技术，转动轴（4）穿过输气管（13）与螺旋桨（2）相连。
The utility model discloses an air filter, which relates to the absorption technology of charcoal (9), a rotation shaft (4) is connected with a propeller (2) through a gas pipe (13);
一种空气过滤机，它涉及炭（9）的吸附技术，转动轴（4）穿过输气管（13）与螺旋桨（2）相连。
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