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| pulse-position modulation | |||
| pulse position modulation | |||
| pulse phase modulation | |||
| 脉冲位置调制: 9 phrases in 6 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 2 |
| Geophysics | 2 |
| Technology | 2 |
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