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| 71. | projector power response |
| 射声器功率响应|发送功率响应 |
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| 72. | film inspection projector |
| 鉴定放映机 |
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| 73. | projector for transferring |
| 投影转绘仪 |
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| 74. | ground signal projector |
| 信号枪|地面信号发射器 |
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| 75. | narrow gauge projector |
| 窄胶片放映机 |
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| 76. | multipurpose film projector |
| 多用放映机 |
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| 77. | navigational microfilm projector |
| 航海用显微胶卷放映器 |
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| 78. | large contour projector |
| 大型轮廓投影仪 |
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| 79. | magnifying shape projector |
| 投影放大仪 |
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| 80. | film projector room |
| 电影放映室 |
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