digital electronic device for counting telephone conversations in separated units and cost to install in the long-distance telephone booths

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  机译： 电子电话资费记录器-具有对话成本的数字显示

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  机译： 重新初始化连接到电话系统或安装在电话系统中的设备的数字控制单元的设备

• 5. Device for reinitialising digital control units of apparatus connected to or installed in telephone systems [P] . 法国专利： FR2670644A1 . 1992-06-19

  机译： 重新初始化连接到电话系统或安装在电话系统中的设备的数字控制单元的设备

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