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to phrases
—次反射
telecom.
single hop
次反射
oil
secondary
次 反 射
:
110 phrases
in 14 subjects
Acoustics
1
Air defense
9
Automobiles
7
Construction
1
Earth sciences
1
Electronics
1
Explosives and Explosive Ordnance Disposal
4
General
11
Geophysics
3
Metallurgy
6
Oil / petroleum
27
Space
1
Technology
33
Telecommunications
5
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