With plenty of population from other districts and its frequent floating, the joint of city and outskirts is the place where there are frequently a large number of grave cases in the big city.
城郊结合部外来人口多，人员流动频繁，是大城市案件多发、大案频发的地带。
2
A telescoping joint at the surface in floating offshore operations that permits vessel heave (vertical motion) while maintaining a riser pipe to the seafloor.
浮动海洋钻井作业时位于水面的伸缩节，它允许钻井船升降(垂直运动)而保持导管接触海底。
3
The control problem of joint motion of a free-floating space robot with dual-arms was discussed.