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81. | alternating current tractio |
| 交流牵引 |
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82. | alternating-current generating set |
| 交流发电机组 |
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83. | Intercollegiate exchanges |
| 校际交流 |
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84. | alternating electromagnet |
| 交流电磁铁 |
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85. | single phase alternating current |
| 单相交流 |
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86. | alternating current resistance box |
| 交流电阻箱 |
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87. | alternating current corona |
| 交流电晕 |
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88. | alternating current tube |
| 交流电子管 |
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89. | alternating current electrical engineering |
| 交流电工学 |
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90. | alternating-current amplifier |
| 交流放大器 |
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