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办公系统自动化 : 16 phrases in 8 subjects |
| Agriculture | 1 |
| Aviation | 3 |
| Communications | 2 |
| Electronics | 5 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Information technology | 2 |
| Nautical | 1 |
| Technology | 1 |
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