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| pulse coding system | |||
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脉 冲 编码制 : 40 phrases in 11 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Earth sciences | 3 |
| Electronics | 1 |
| Geophysics | 7 |
| Information technology | 5 |
| Multimedia | 3 |
| Remote sensing | 1 |
| Space | 4 |
| Technology | 8 |
| Telecommunications | 4 |
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