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| letter of confirmation | |||
| 证 实 书: 24 phrases in 11 subjects |
| Aviation | 1 |
| Business | 4 |
| Commerce | 1 |
| Cryptography | 1 |
| Economy | 2 |
| International trade | 8 |
| Project management | 2 |
| Securities | 1 |
| Technology | 1 |
| Textile industry | 2 |
| United Nations | 1 |
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