同中心 meaning in Chinese

concentricity

The number of ligands attached to the central ion is called the coordination number .
同中心离子连接的配位体，数目称为配位数。
The materials come into inlet from upper side of machine , and they fall down onto the dispersing materials plate rotating with central axis in two ways , then the materials are sent into passage between rollers and rings , after they are grinded into pieces , they are discharged from the down lip
物料从机器上部侧面进料斗进入，分两路散落在同中心轴一起旋转的散料盘上，沿圆周通道均匀送入磨环和磨辊之间，被磨辊碾压碎后从下部排料口排出。