displacement recorder

例句：

1. 1. The displacementrecorder was used to measure the displacementof the object.
   位移记录器被用来测量物体的位移。
2. 2. The displacement recordershowed that the object had moved slightly.
   位移记录器显示物体已经移动了一点。
3. 3.The displacement recorder was used to monitorthe movement of the object.
   位移记录器被用来监控物体的运动。