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系统成分
tech.
system composition
系统成分:
42 phrases
in 17 subjects
Agriculture
1
Automobiles
1
Aviation
10
Desert science
1
Earth sciences
1
Electronics
4
Explosives and Explosive Ordnance Disposal
1
General
1
Information technology
1
Logistics
1
Metallurgy
1
Project management
3
Securities
1
Space
1
Sports
2
Technology
11
United States
1
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