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后备设备
el.
backup
;
back-up
后备设备:
51 phrases
in 23 subjects
Agriculture
1
Architecture
1
Automobiles
2
Aviation
6
Business
2
China
1
Ecology
1
Economy
1
Electric machinery
1
Electronics
5
General
1
Information technology
3
International trade
1
Mechanic engineering
1
Metallurgy
1
Plastics
2
Polymers
1
Project management
1
Shipbuilding
8
Space
1
Technology
8
United Nations
1
Water resources
1
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