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发明名称	ISDN EXCHANGE SYSTEM
摘要
申请公布号	JPS6451742(A)	申请公布日期	1989.02.28
申请号	JP19870208440	申请日期	1987.08.21
申请人	NEC CORP;NEC COMMUN SYST LTD	发明人	YAMADA KENJI;DEGUCHI HIROSHI
分类号	H04Q3/60	主分类号	H04Q3/60
代理机构		代理人
主权项
地址

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