KTH1型扩音自动电话机
Model KTH1 Automatic Telephone with Amplifying
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摘要: 介绍了一种具有自动电话功能及铃流扩音、语言广播等特殊功能的话机
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关键词:
- 自动电话机扩音电话电路分析
Abstract: This paper described a telephone which has automatic telephone functions and special functions like ringing amplifying, speech broadcasting and so on. -
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