GPS Positioning Services Specified In The Federal Radionavigation Plan;
全球系统为联邦无线电导航计划服务;
GPS Positioning Services Specified In The Federal Radionavigation Plan;
全球系统为联邦无线电导航计划服务;
The risk assessment study indicates that the satellite system can't be considered as the sole-means for the nations radionavigation system.
风险评估表星基系统(GPS、GLONASS)不作为唯一导航、、时手段。
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