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| 61. | Spark discharge |
| 火花放电 |
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| 62. | flashwelding machine |
| 闪光焊机 |
|
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| 63. | flare pistol |
| 闪光信号枪 |
|
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| 64. | explosive spark |
| 爆炸火花 |
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| 65. | alternating and flashing |
| 互闪光 |
|
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| 66. | spark arrestor |
| 火花避雷器 |
|
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| 67. | `The twinkling of the what?' |
| “什么闪光？” |
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| 68. | spark chamber |
| 火花室 |
|
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| 69. | Photograph by flash. |
| 闪光摄影 |
|
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| 70. | electrostatic spark |
| 静电火花 |
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