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发明名称
摘要
申请公布号
NL7002532(A)
申请公布日期
1970.09.08
申请号
NL19700002532
申请日期
1970.02.23
申请人
发明人
分类号
H04J3/12;H04Q11/04;(IPC1-7):H04Q11/04
主分类号
H04J3/12
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代理人
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