swing-door method

The ordinary spherical seal method is used in hydraulic swing arm, but its practise proves that the phenomenon of permeating and leaking oil often occur.

目前使用的液压推靠器中普遍采用了球形密封方法，实践证明该方法常有渗、漏油现象发生。

The plane swing and longitude vibration of the tethered satellite system are discussed in this paper. By the analytical method of Melnikov and numerical calculation of Poincare section, it is observed that the system may perform a chaotic motion.

讨论了绳系卫星的纵向振动与姿态运动的耦合.利用Melnikov方法和Poincare截面的计算，证明卫星摆动具有不可预测的混沌行为。

The purpose of this study is to analyze the swing arm method of Green and explain its mechanic meaning as well as the positive effect on increasing 100-meter scores to farther indicate the importance of arm strength training to sprint exercises.

对格林摆臂方式进行力学分析，探讨其对百米成绩的积极作用，进而说明上肢训练对短跑的重要性。

Based on the approach of adaptive saddle-fitting, the circle point on the moving plane of the swing arm and the centre points on different moving planes corresponding to diverse mechanisms are searched for by optimization method.

在自适应运动综合理论的基础上，运用优化方法在摆动杆的运动平面上搜索圆点以及其对应各个方案解下不同运动平面上的圆心点，作为二级杆组的两个铰链点。

3, High precision value of G could be measured by means of the swing time method of the torsion pendulum, where the precision of G is mainly dependent on the precise of the period of a torsion pendulum.

高精度的G值大都采用扭秤周期法测得，其精度主要依赖于扭秤周期的精度。