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periodic reverse
| current
| periodic reverse | |
| tech. | 周期性换向 |
| current | |
| fin. | 流动的; 本 ，本期的 |
| hydroel.st. | 水流; 气流 |
| met. | 通用的 |
| perf. | 潮流 |
| radio.amat. | 电流 |
| space | 交流 |
| |||
| 周期性换向 | |||
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periodic reverse current : 8 phrases in 5 subjects |
| Chemistry | 1 |
| Electronics | 2 |
| General | 1 |
| Metallurgy | 2 |
| Technology | 2 |
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