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| 电子学开关脉冲 | |||
| 控制〔转换〕脉冲 | |||
| 转换脉冲; 控制脉冲 | |||
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switching pulse : 17 phrases in 6 subjects |
| Air defense | 1 |
| General | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 10 |
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