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元环
oil
nineteen-ring 19
元环
:
97 phrases
in 29 subjects
Agriculture
4
Automatic control
1
Aviation
1
Business
1
Chemistry
18
Computer networks
1
Construction
1
Desert science
3
Earth sciences
4
Ecology
1
Economy
2
Electronics
15
Explosives and Explosive Ordnance Disposal
1
General
4
Information technology
3
International Monetary Fund
1
Mathematics
1
Mechanics
1
Nautical
1
Oil / petroleum
5
Plastics
1
Polymers
2
Refrigeration
2
Space
3
Statistics
1
Technology
14
Telecommunications
1
United Nations
1
Water resources
3
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