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to phrases
频率组
mil., air.def.
frequency group
频率 组
:
46 phrases
in 19 subjects
Agriculture
2
Air defense
4
Aviation
1
Business
4
Electronics
8
General
2
Genetics
1
Geophysics
1
Life sciences
1
Mathematics
2
Metallurgy
2
Oil / petroleum
2
Shipbuilding
1
Space
1
Sports
2
Statistics
2
Technology
8
Telecommunications
1
United States
1
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