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71. | intermediate switch |
| 中间开关 |
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72. | connector switch |
| 连接器开关 |
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73. | electrical switch |
| 电气开关 |
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74. | breakdown switch |
| 故障开关 |
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75. | electrolytic switch |
| 电解开关 |
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76. | interconnection switch |
| 联络开关 |
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77. | nontrailable switch |
| 非挤岔式道岔 |
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78. | capacitor switch |
| 电容器开关 |
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79. | tropical switch |
| 热带用开关 |
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80. | centralized switch |
| 集中式开关 |
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