相位比较角无线电跟踪系统 minitrack 跟踪 follow the tracks of; tail after; following; follow-up tracing; track; trackin ..
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N a system for tracking the course of rockets or satellites by radio signals received at ground stations 一种用从地面接收无线电追踪卫星和火箭轨迹的系统 [trademark] [OBSOLETE]
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