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开机模式 |
on mode : 24 phrases in 12 subjects |
Air defense | 1 |
Communications | 2 |
Ecology | 2 |
Electronics | 3 |
Exhibitions | 1 |
International trade | 1 |
Oil / petroleum | 1 |
Project management | 1 |
Space | 2 |
Technology | 4 |
Telecommunications | 5 |
United Nations | 1 |