• The paper introduces a new type of common line talk back system. Complete circuit diagram and an adjusting method are presented in this paper.

    文中介绍一种新型总线形式、双工通话对讲系统给出完整电路原理图调试方法

    dict.cnki.net

  • The paper introduces a new type of common line talk back system. Complete circuit diagram and an adjusting method are presented in this paper.

    文中介绍一种新型总线形式、双工通话对讲系统给出完整电路原理图调试方法

    dict.cnki.net

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