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电磁波测距
avia. electro-magnetic distance measurement
geophys. electromagnetic wave distance measuring
space electromagnetic distance measurement; electromagnetic wave distance measurement
电磁波测距以直接或间接方式测量电磁波在待侧距离两端点间一次往返的传播时间来求得距离的测量方法。电磁波测距又称“物理测距”。利用电磁波作为载波，运载测距信号，进行精密测距的技术。其基本原理是根据电磁波的传导波速和往返于发射器与反射器之间的时间，计算发射器与反射器之间的距离
expl. electromagnetic wave distance measuring; electro-magnetic distance measurement EDM
电 磁波测距: 16 phrases in 5 subjects
Earth sciences1
Geophysics1
Oil / petroleum1
Space3
Technology10

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