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navigation satellite timing and ranging global positioning system
navig. 导航卫星的计时与测距全球定位系统
navigation satellite timing and ranging/global positioning system
earth.sc. 时距导航卫星/全球定位系统; 导航卫星测时和测距/全球定位系统
el. 导航卫星定时与测距/全球定位系统; 导航星全球定位系统
navigation satellite timing and ranging-global positioning system
USA, space 导航星全球定位系统

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