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effect time
busin.
有效期
effect time
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51 phrases
in 22 subjects
Air defense
1
Artificial intelligence
2
Bridge construction
1
Business
3
China
2
Commerce
2
Ecology
1
Economy
4
Electronics
3
Engineering geology
2
Explosives and Explosive Ordnance Disposal
3
Hydroelectric power stations
2
International trade
1
Metallurgy
1
Oil / petroleum
1
Plastics
1
Power system protection
1
Shipbuilding
1
Technology
16
Telecommunications
1
Textile industry
1
Wind Energy
1
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