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| 系统例行程序; 系统例程 | |||
| system routine: 19 phrases in 9 subjects |
| Aviation | 2 |
| China | 1 |
| Computers | 1 |
| Construction | 1 |
| Electronics | 3 |
| Information technology | 2 |
| Space | 3 |
| Technology | 5 |
| Telecommunications | 1 |
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