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关注：1
2013-05-23 12:21
求翻译：1962年，美国研究成功了脉码调制设备，用于电话的多路化通信。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
1962年，美国研究成功了脉码调制设备，用于电话的多路化通信。
问题补充： |
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2013-05-23 12:21:38
In 1962, U.S. researchers successfully pulse code modulation equipment for telephone-based multi-channel communications.
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2013-05-23 12:23:18
In 1962, the United States has successfully researched Pulse Code Modulation device used to telephone the number of road traffic.
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2013-05-23 12:24:58
In 1962, US studied the successful pulse-code modulation equipment, used in the telephone the multi-channel correspondences.
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2013-05-23 12:26:38
In 1962, the United States study success of pulse code modulation equipment, channelization used for telephone communications.
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2013-05-23 12:28:18
In 1962, the United States study success of pulse code modulation equipment, channelization used for telephone communications.
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