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to phrases
一次
雷达
系统
mil., air.def.
primary system
一次系统
hydroel.st.
primary system
一 次 系统:
49 phrases
in 19 subjects
Air defense
1
Aviation
2
Biotechnology
1
Construction
1
Cryptography
1
Drilling
2
Electronics
15
Hydroelectric power stations
2
Information technology
1
Mining
1
Nautical
1
Navigation
1
Project management
1
Refrigeration
1
Space
3
Technology
12
Telecommunications
1
United Nations
1
Wind Energy
1
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