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| 81. | spark plug engine |
| 火花塞发火发动机 |
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| 82. | spark erosion technique |
| 电火花加工技术 |
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| 83. | spark gap width |
| 火花隙宽度 |
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| 84. | spark quenching condenser |
| 火花猝灭电容器 |
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| 85. | spark ignition engine |
| 火花点火式引擎 |
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| 86. | spark over test |
| 跳火试验 |
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| 87. | spark impact transmitter |
| 冲击火花发报机 |
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| 88. | spark plug insulator |
| 火花塞绝缘体 |
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| 89. | spark of genius |
| 天才的闪现，天才的火花 |
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| 90. | spark test apparatus |
| 火花试验装置 |
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