to and fro motion

基本解释

Coupled vibrations of the jigging motion with the to-and-fro motion are frequently encountered in the run of four wheel drive vehicles such as loaders. At the same time.
装载机等四轮驱动车辆行驶时，容易出现俯仰与前后水平方向耦合振动。
A new training apparatus for legs based on crank and rocker mechanism, is proposed in this paper. It can simulate the to-and-fro motion of the sporter's legs realistically.
介绍了一种最新研制的训练腿部力量的健身器械，该健身器械采用了曲柄摇杆机构，能真实地模拟运动员双腿交替运动。
This impulsion tool uses a high speed on-off valve to control to-and-fro motion of the distributing oil valve core, which impels the cylinder rod to-and-fro motion to form impulsion.
本文在对国内外现有的机械臂液压驱动系统设计理论和控制方式进行了综合分析后，研究了基于高速开关阀先导控制的新型机械臂液压驱动系统。