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发明名称
PROTECTING METHOD FOR DIGITAL SERVICE CHANNEL
摘要
申请公布号
JPS6486728(A)
申请公布日期
1989.03.31
申请号
JP19870244702
申请日期
1987.09.29
申请人
FUJITSU LTD
发明人
NOZUE YOSHIHIRO;YAGI TAKESHI;AKUTSU MASAHARU
分类号
H04J3/00;H04J3/14
主分类号
H04J3/00
代理机构
代理人
主权项
地址
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