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| 71. | Audio Materials Library |
| 听觉材料室 |
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| 72. | audio connecting equipment |
| 音频连接设备 |
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| 73. | audio fader amplifier |
| 声频控制放大器;音量控制放大器 |
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| 74. | audio processing equipment |
| 音频处理设备 |
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| 75. | audio frequency band |
| 声频频带 |
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| 76. | audio level indicator |
| 音频电平指示器 |
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| 77. | audio frequency meter |
| 音频频率计 |
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| 78. | audio modulating voltage |
| 调制声压 |
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| 79. | audio interpolation oscillator |
| 声频内插式振荡器 |
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| 80. | audio response calculator |
| 声音回答计算器;答话计算器 |
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