A constantrotational speed can be restored by fitting a second joint in a way such that when the first joint increases its speed the second joint decreases its speed.
要实现等速，必须以某种方式安装第二个万向节，这样第一个万向节使转速增大，第二个万向节就使转速减少。
2
The path integral Monte Carlo method with a constant pressure ensemble is used to study the equation of state of solid hydrogen with translational and rotational degrees of freedom.
同时考虑分子的平动与转动自由度，用等温等压系综的路径积分蒙特卡罗方法研究了固体氢的状态方程。
3
Biological information processing mechanism and constant pressure network technology were researched to control the rotational speed of hydraulic motor.