Even if Russia starts producing GPS-compatible transceivers, it has no chance of defeating NavstarGPS, which has dominated the world market for almost 20 years.
即使俄罗斯开始生产与GPS间通的接收机，也没有机会击败GPS系统，该系统已经统治全球市场近20年。
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This article has been prepared to acquaint potential users with the fundamental principles of the Navstar Global Positioning System(GPS)and the utilization of GPS equipment in many fields.