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| 模拟信号源 | |||
| 信号模拟器 | |||
| 仿真信号源 | |||
| signal simulator: 13 phrases in 6 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 3 |
| Space | 6 |
| Technology | 1 |
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