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有效系统
busin. helpful system
IT effective system
有效系统
: 80 phrases in 21 subjects
Agriculture3
Air defense1
Aviation20
Business2
China1
Earth sciences1
Economy2
Electronics6
Geophysics1
Horticulture1
Information technology4
Management2
Nautical1
Project management1
Quality control and standards2
Space21
Statistics2
Technology5
Telecommunications1
United States1
Wind Energy2

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