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71. | simple alternating current |
| 正弦交流 |
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72. | Information Exchange |
| 信息交流 |
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73. | AC control system |
| 交流控制系统 |
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74. | damped alternating current |
| 衰减交流 |
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75. | A.C.(alternating current) |
| 交流[电] |
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76. | alternating-current transmission |
| 交流传输 |
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77. | alternate-current selection |
| 交流选择 |
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78. | AC electromotive force |
| 交流电动势 |
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79. | alternating current converter |
| 交流换流器 |
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80. | eliminator receiver |
| 交流收音机 |
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