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31. | AC electroluminescence |
| 交流电致发光 |
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32. | ACSP (AC Spark Plug) |
| 交流火花塞 |
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33. | first hand exchange |
| 直接交流 |
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34. | AC power system |
| 交流电力系统 |
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35. | alternating current (a.c.) |
| 交流电流 |
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36. | AC electric machine |
| 交流电机 |
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37. | Cross-cultural communication |
| 跨文化交流 |
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38. | AC point machine |
| 交流电动转辙机 |
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39. | ac distribution |
| 交流配电 |
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40. | AC voltage stabilizer |
| 交流稳压器 |
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