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| technical know-how | |||
| 技术保密: 11 phrases in 9 subjects |
| Air defense | 2 |
| Business | 1 |
| China | 1 |
| Commerce | 1 |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Information technology | 1 |
| International trade | 1 |
| Nautical | 1 |
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