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| 71. | casing for spark adjustment |
| 火花调整箱 |
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| 72. | spark quenching device |
| 火花扑灭装置 |
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| 73. | spark-gap generator |
| 火花隙振荡器 |
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| 74. | formative time of spark |
| 火花形成时间 |
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| 75. | safety spark gap |
| 安全火花隙 |
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| 76. | ignition by induction spark |
| 电感火花点火 |
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| 77. | flashing over of spark |
| 火花飞弧 |
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| 78. | electrodes for spark machining |
| 火花加工焊条 |
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| 79. | needle point spark gap |
| 针尖火花隙 |
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| 80. | vacuum-spark ion source |
| 真空火花离子源 |
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