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Priority to JP19861883UpriorityCriticalpatent/JPS60108063U/ja
Publication of JPS60108063UpublicationCriticalpatent/JPS60108063U/ja
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Publication of JPS6342605Y2publicationCriticalpatent/JPS6342605Y2/ja
Method and device for controlling operation of line feeded coin-operated telephone set, further method and device for realizing telephone connection b line-feeded telephone set