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71. | spark erosion fabrication |
| 电火花腐蚀加工 |
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72. | three-electrode spark |
| 三电极火花 |
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73. | master spark gap |
| 主控火花隙 |
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74. | spark arrester netting |
| 火星网 |
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75. | controllable spark gap |
| 可控火花隙 |
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76. | asynchronous spark gap |
| 非同步火花隙 |
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77. | timed spark system |
| 定时火花放电装置 |
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78. | manual spark advance |
| 手控点火提前装置 |
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79. | spark chamber picture |
| 火花室图片 |
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80. | retarded spark timing |
| 延迟点火正时 |
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