建议性标准RS- 4 85作为一种多点、差分数据传输的电气规范现已成为业界应用最为广泛的标准通信接口之一。
RS-485 is one of standard communication interfaces, which is widely used in industry field as a multi point, differential data transferring electric criterion.
利用CDMA无线数据传输技术传送gps差分数据可以扩大测区范围，实现高精度实时动态定位。
We can enlarge the range of mapping region by utilizing CDMA wireless data transmission in transporting GPS difference data, and realize high precision orientation of real time.
利用CDMA无线数据传输技术传送gps差分数据可以扩大测区范围，实现高精度实时动态定位。
We can enlarge the range of mapping region by utilizing CDMA wireless data transmission in transporting GPS difference data, and realize high precision orientation of real time.
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