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| 71. | three-phase AC locomotive |
| 三相交流机车 |
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| 72. | series transformator |
| 串联变压器|电流变压器 |
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| 73. | Dispersion waveform of travelling wave propagation of three-phase short-circuit and three-phase to earth short-circuit |
| 三相相间短路和三相接地短路行波图 |
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| 74. | three-phase seven-wire system |
| 三相七线制 |
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| 75. | 3-phase arc furnace for steel melting |
| 三相电弧炼钢炉 |
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| 76. | three-phase AC asynchronous motor |
| 三相交流异步电动机 |
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| 77. | three phase alternating inverse power supply |
| 三相交流逆变电源 |
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| 78. | three-phase line of contact |
| 三相接触线 |
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| 79. | three unbalanced power |
| 三相不平衡功率 |
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| 80. | three-phase three-wire system |
| 三相三线制 |
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