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71. | single phase alternating current |
| 单相交流 |
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72. | exchange programme |
| 交流计划 |
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73. | alternate current converter |
| 交流变换器 |
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74. | alternating current electrical engineering |
| 交流电工学 |
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75. | alternating current detector |
| 交流指示器 |
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76. | Intercollegiate exchanges |
| 校际交流 |
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77. | alternating-current demagnetizatio |
| 交流退磁 |
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78. | alternating current corona |
| 交流电晕 |
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79. | alternating-current generating set |
| 交流发电机组 |
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80. | alternating current resistance box |
| 交流电阻箱 |
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