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系统自测试
avia. system self test
系统自测试程序
el. system self-test program
系统自测试: 100 phrase in 15 subjects
Air defense1
Automobiles2
Aviation27
Drilling1
Earth sciences3
Electric machinery1
Electronics28
General1
Information technology3
Mechanics2
Metallurgy1
Mining5
Space16
Technology4
Telecommunications5

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