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center control
dril.	中心控制

center control: 623 phrases in 44 subjects

Air defense	22
Architecture	1
Automobiles	7
Aviation	156
Business	4
Chess	1
Communications	3
Computer networks	1
Desert science	1
Drilling	2
Earth sciences	14
Ecology	1
Economy	4
Electronics	131
Environment	3
General	18
Geophysics	4
Hydroelectric power stations	1
Information technology	5
International trade	1
Life sciences	2
Logistics	1
Management	1
Mechanics	1
Metallurgy	2
Military	4
Missiles	1
Name of organization	1
Navigation	7
Oil / petroleum	4
Oil processing plants	1
Project management	1
Rail transport	3
Refrigeration	1
Securities	1
Shipbuilding	3
Space	118
Steel production	2
Technology	54
Telecommunications	3
Textile industry	1
United Kingdom	1
United Nations	1
United States	29