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to phrases
无源探测
wúyuán tàncè
mil., air.def.
passive detection
tech.
passive sounding
无源探测
:
26 phrases
in 11 subjects
Air defense
9
Aviation
3
Compressors
1
Drilling
1
Earth sciences
2
Electronics
1
General
1
Geophysics
1
Radio
1
Space
5
Technology
1
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