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发明名称
摘要
申请公布号
JPS6227582(B2)
申请公布日期
1987.06.16
申请号
JP19800074930
申请日期
1980.06.05
申请人
NIPPON TELEGRAPH & TELEPHONE
发明人
IMAI KAZUO;MIZUNO TOSHIRO
分类号
H04L12/18
主分类号
H04L12/18
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