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检查数
tech.
checking number
检查数:
58 phrases
in 22 subjects
Agriculture
1
Automated equipment
1
Automobiles
3
Aviation
4
Business
6
Commerce
2
Computer networks
1
Earth sciences
1
Electronics
2
General
2
Information technology
3
International Monetary Fund
1
Mathematics
1
Navigation
1
Oil / petroleum
2
Project management
1
Shipbuilding
1
Space
2
Statistics
1
Technology
16
Telecommunications
4
Textile industry
2
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