| |||
time of investigation |
研究时间 : 57 phrases in 14 subjects |
Aviation | 1 |
Business | 16 |
Commerce | 3 |
Earth sciences | 1 |
Economy | 2 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 1 |
Human resources | 1 |
Labor law | 2 |
Management | 16 |
Mechanics | 1 |
Metallurgy | 1 |
Space | 4 |
Technology | 7 |