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| 中央电极端子 | |||
| 电话交换局终端 | |||
| 中心电站 | |||
| 综合交通枢纽 | |||
| 中央终端 | |||
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| 综合交通枢纽 | |||
| central terminal: 30 phrases in 11 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Business | 1 |
| Earth sciences | 1 |
| Electronics | 7 |
| Information technology | 3 |
| Metallurgy | 1 |
| Nursing | 1 |
| Space | 4 |
| Technology | 5 |
| Telecommunications | 4 |
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