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| 71. | image enlarger lamp |
| 图像放大灯 |
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| 72. | magnetic amplifier type |
| 磁放大式 |
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| 73. | quick release valve |
| 快放阀 |
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| 74. | radio-frequency gap |
| 射频放电器 |
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| 75. | leak off connection |
| 放泄接头 |
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| 76. | M. D. (M/D) [memorandum of deposit] |
| 存款(放）单［ |
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| 77. | book of offsets |
| 放样簿 |
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| 78. | heat from arcing |
| 电弧放电热 |
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| 79. | gas-discharge source |
| 气体放电源 |
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| 80. | resonant discharger |
| 谐振放电器 |
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