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发明名称
摘要
申请公布号
NL6919064(A)
申请公布日期
1970.06.23
申请号
NL19690019064
申请日期
1969.12.19
申请人
发明人
分类号
H03B21/02;H04B1/50;(IPC1-7):H04Q7/00
主分类号
H03B21/02
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