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The US Space Force owns and operates the GPS constellation, providing civilian and military-grade positioning, navigation, and timing signals to cell phones, airliners, naval ships, precision munitions, and a whole lot more.
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由此也在当年给消费者们留下了这样的印象，预算有限买不了原厂，又不想买的太差，又懒得挑，选绿联就准没错。