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经营范围
发明名称
CHANNEL PROTECTING SYSTEM IN ABNORMALITY OF DIGITAL HIGHWAY
摘要
申请公布号
JPS6297459(A)
申请公布日期
1987.05.06
申请号
JP19850237110
申请日期
1985.10.23
申请人
NEC CORP;NEC ENG LTD
发明人
ISHII KENJI;NAITO TSUNEO
分类号
H04M3/18;H04B14/04;H04B15/00
主分类号
H04M3/18
代理机构
代理人
主权项
地址
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