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| commercial correspondence | |||
| business communication; business correspondence | |||
| commercial communication | |||
| 商业通信: 29 phrases in 10 subjects |
| Aviation | 2 |
| Computer networks | 1 |
| Cryptography | 1 |
| Electronics | 13 |
| Information technology | 2 |
| International trade | 1 |
| Securities | 1 |
| Space | 5 |
| Telecommunications | 2 |
| United States | 1 |
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