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61. | main audio track |
| 主伴音磁迹 |
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62. | audio - visual service |
| 声像服务 |
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63. | adjacent audio channel |
| 相邻伴音通道 |
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64. | first audio stage |
| 初级|前级 |
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65. | dual channel audio |
| 双通道音频 |
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66. | mini audio equipment |
| 迷你型音响 |
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67. | modulating audio frequency |
| 调制音频 |
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68. | prospecting audio-indicator |
| 探矿用音响指示器 |
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69. | prearranged audio signals |
| 预定的音频信号 |
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70. | audio compressor-expander |
| 声频压缩扩展器 |
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