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发明名称
DIGITAL EXCHANGE SYSTEM
摘要
申请公布号
JPH05130120(A)
申请公布日期
1993.05.25
申请号
JP19910286463
申请日期
1991.10.31
申请人
TOKYO ELECTRIC CO LTD
发明人
ETO YOSHIRO
分类号
H04L12/42;H04L12/44
主分类号
H04L12/42
代理机构
代理人
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