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to phrases
备用控制
el.
back-up control
space
backup control
备用 控制
:
52 phrases
in 14 subjects
Air defense
2
Aviation
19
Drilling
1
Electronics
12
Energy industry
1
General
1
Hydroelectric power stations
2
Information technology
1
Mechanics
1
Military
1
Space
3
Technology
3
Telecommunications
2
Water resources
3
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