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| 直接流通渠道 | |||
| 直达信道; 直通信道 | |||
| direct channel: 28 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 3 |
| Electronics | 11 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Space | 2 |
| Technology | 5 |
| Telecommunications | 3 |
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