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发明名称
DIGITAL DATA EXCHANGE
摘要
申请公布号
JPH0482453(A)
申请公布日期
1992.03.16
申请号
JP19900197171
申请日期
1990.07.25
申请人
NEC CORP;NEC ENG LTD
发明人
SASABUCHI HISAO;WATANABE MITSUKO
分类号
H04Q3/42;H04M3/00;H04Q11/04
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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