When the position of end executor has been changed, it can still implement orientation without the need of re calibration.
当末端执行器的位置变化时，不需要对系统进行重新标定。
It's a difficult task to implement orientation, monitoring, data and phonetic communication for some mobile equipment including vehicles moving in a large scale.
对动态的并作大范围移动的设备同时实施定位、监控、数据通信、语音通信，是一个较难解决的问题。
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