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2 类控制
avia. control category 2
1 类控制
avia. control category 1
类控制: 38 phrases in 16 subjects
Agriculture1
Aviation4
Business4
Computer networks1
Economy2
Electronics1
Explosives and Explosive Ordnance Disposal2
Finances3
Information technology3
Metallurgy1
Project management1
Technology11
Telecommunications1
Textile industry1
United Nations1
Wind Energy1

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