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| 用户-用户规程 | |||
| 用户_用户协议 | |||
| 用户-用户协议 | |||
| 用户至用户协议 | |||
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user -user protocol : 23 phrases in 10 subjects |
| Air defense | 2 |
| Aviation | 1 |
| Computer networks | 1 |
| Electronics | 7 |
| Information technology | 4 |
| Multimedia | 1 |
| Project management | 2 |
| Space | 2 |
| Technology | 1 |
| Telecommunications | 2 |
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