圆形工件由真空夹持器拾起，运送一小段距离后放置在小型运载装置上，最终工件被运送回原点。
The round workpieces are picked up by a vacuum gripper, transported a short way and set down on a small carrier, which conveys the parts back to the starting point.
在无限和真空的空间中，地磁场在强度上随距离3次方而衰减。
In a infinite and empty space the geomagnetic field falls off in strength with the third power of distance.
在真空或无限大均匀电介质中，无限大均匀带电平面的电场强度处处相等，和场点距离该平面的远近无关。
In the vacuum or infinite evenly charged dielectric materials, the field strength of its surface equals at all spots. And it has no relation with the distance of the field spots to the surface.
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