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| 51. | alarm installation |
| 报警信号装置 |
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| 52. | electromechanical alarm |
| 机电式报警器 |
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| 53. | engineer's alarm |
| 轮机员报警器 |
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| 54. | alarm thermometre |
| 报警温度计 |
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| 55. | alarm acknowledged |
| 警报获悉 |
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| 56. | alarm indicator |
| 告警指示器 |
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| 57. | alarm directive |
| 警报指示 |
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| 58. | alarm manometer |
| 报警气压计;报警压力计 |
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| 59. | alarm dosimeter |
| 报警剂量计 |
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| 60. | overtemperature alarm |
| 超温报警 |
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