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| 51. | millisecond delay cap |
| 毫秒延发雷管 |
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| 52. | explosive cable |
| 引爆电缆 |
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| 53. | A small explosive placed on a railroad track that is fired by the weight of the train to sound a warning of an approaching hazard. |
| 信号雷管一种置于铁路轨道上的小型爆炸物，由火车的重量引爆，这样来预警临近的危险 |
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| 54. | half second delay detonator |
| 半秒迟发雷管 |
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| 55. | gasless delay detonator |
| 无烟迟发雷管 |
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| 56. | regular blasting cap |
| 普通迟发电雷管 |
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| 57. | seismograph electric detonator |
| 地震探矿用电雷管 |
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| 58. | millisecond delay detonator |
| 毫秒延时电雷管 |
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| 59. | short-delay detonator |
| 短时延发雷管 |
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| 60. | ectric delayed detonator |
| 非电延期雷管 |
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