Improvements in or relating to circuit arrangements for checking operation of time division telephone exchange line control units,申请号GB19810006467-传众专利搜索

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发明名称	Improvements in or relating to circuit arrangements for checking operation of time division telephone exchange line control units
摘要
申请公布号	GB2073547(A)	申请公布日期	1981.10.14
申请号	GB19810006467	申请日期	1981.03.02
申请人	ITALTEL SPA	发明人
分类号	H04M3/24;H04Q11/04;(IPC1-7):H04M3/28	主分类号	H04M3/24
代理机构		代理人
主权项
地址

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