It describes the structure of the message accounting device.

文中对集中管理式公用电话计费器的硬件设计作了系统的描述.

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We design the special interface circuit between the message accounting device and the telephone wire.

自己设计了电话计费器与电话线的独特接口电路.

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The system consists of the centralized management center and the centralized manageable message accounting devices.

系统由公用电话集中管理中心与集中管理式电话计费器组成.

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