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to phrases
material system
avia.
物质系统
;
材料系统
material system
:
114 phrases
in 19 subjects
Air defense
1
Aviation
46
Business
6
Commerce
1
Cryptography
1
Economy
7
Electronics
19
Environment
1
General
3
Information technology
1
International Monetary Fund
2
Management
3
Mechanics
2
Metallurgy
8
Planning
1
Space
3
Steel production
1
Technology
7
Textile industry
1
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