减速

The Brake shoes apply friction to the Brake drum , forcing it and the wheel to slow or stop.

制动蹄对制动鼓所产生的摩擦力迫使制动鼓和车轮减速或停车。

It adopts a friction drive mechanism comprised of 4 steel cables and internal damping friction roller as its actuating mechanism.

该机工作执行机构是4根钢丝绳与内减速摩擦滚筒组成的摩擦传动机构。

In addition, the effect of sliding friction between gear teeth can not be neglected.

本文针对传统的船用齿轮在强度计算中不计船体变形及齿间摩擦力的问题，以沿船体纵向布置的渐开线料齿减速齿轮机构为研究对象，通过系统地分析、研究，推导出综合考虑船体变形及齿间摩擦的船用料齿轮齿面接触疲劳强度计算公式，以进一步完善船用齿轮的强度计算。

For the plane wave of laser without pulse shape, we derive the express of electron trajectory by the relative Lorentz and energy equations. Note that the orbit of electron becomes a "fat-8" in the average rest frame. For the plane wave of Gaussian laser, we may know that, through relative Hamilton-Jacobi equation, electrons are accelerated in the front of pulse and decelerated backward. Whereas for the non-plane wave of Gaussian laser, we solve the Lorentz and energy equations by fourth order Runge-Kutta method.

对于无脉冲形状的激光平面波是从考虑了相对论效应的Lorentz方程和能量方程出发，得到了电子的运动轨迹方程表达式，在纵向平均速度参照系下该电子的轨迹呈现"8"字形；对于高斯型单色激光平面波是从相对论Hamilton-Jacobi方程出发，得到激光平面波在脉冲前沿加速电子而脉冲后沿减速电子，电子能量增益为零；而对于高斯型单色激光非平面波是从拉格朗日运动方程和能量方程出发，通过四阶Runge-Kutta法数值求解，得到电子在纵向有质动力、横向电场作用下加速电子，最后在强大的横向有质动力作用下从脉冲侧面散射出去，可以获得很大能量增益本文得到了相应的电子瞬时动量解析表达式。

By the use of a finite element method the authors have calculated the stress and rigidity of a main reduction gear box case body for a certain type of cement mill.

应用有限元法对某型水泥磨机主减速齿轮箱箱体的应力和刚度进行了计算。

You change gear when you want to go faster or more slowly.

你要加速或减速时就换挡。

High gear ratio reduces the need for motors with high power and therefore reduces the cost.

高减速比的设计可以不需要使用大马力的马达，因此成本可以降低。

Speed reducer: Be composed of a planet wheel and a pair of straight gear wheel.

2减速机构：由一个行星轮和一对直齿轮组成。

To reduction gear, the design calculation and necessary strength check of gearwheel and gear shaft have been accomplished.

其中对乳化液泵的传动端采用了曲柄连杆机构，并对曲轴、连杆、十字头及其配件进行了结构设计，运动和动力分析，必要的强度刚度校核；对乳化液泵液力端的柱塞选择和和密封，进行了必要说明；对减速机进行了齿轮和齿轮轴设计计算和强度校核。

To get into orbit it also had to slow down.

要进入轨道它还得要减速

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。