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| 51. | A poor contact causes power to fail occasionally. |
| 接触不良有时会造成断电. |
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| 52. | Monopole planned outage times(MPOT) |
| 单极计划停运次数 |
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| 53. | Bipole unplanned outage times(BUOT) |
| 双极非计划停运次数 |
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| 54. | make and break shock |
| 通电与断电震动 |
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| 55. | uninterrupted power supply |
| 不断电电源设备 |
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| 56. | breaker arm adjusting scre |
| 断电臂调整螺钉 |
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| 57. | dead man's contact |
| 事故自动断电触点 |
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| 58. | UPS [Uninterruptible Power Supply] |
| 不断电电源供应器 |
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| 59. | press the on/off switch |
| 按开关通电[断电] |
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| 60. | The streets were very dark during the blackout. |
| 断电时街上黑沉沉。 |
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