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| 单位冲激信号 | |||
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| ★ 单位脉冲信号 | |||
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unit impulse : 29 phrases in 12 subjects |
| Automatic control | 4 |
| Electric machinery | 3 |
| Electrical engineering | 1 |
| Electronics | 4 |
| General | 1 |
| Geophysics | 1 |
| Information technology | 2 |
| Mathematics | 4 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 6 |
| Telecommunications | 1 |