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发明名称
摘要
申请公布号
BE503669(A)
申请公布日期
1952.09.26
申请号
BED503669
申请日期
1951.06.01
申请人
发明人
分类号
D01G19/04;H03K17/74;H03K17/76;H04J3/04;H04M15/08;H04Q3/00;H04Q3/42
主分类号
D01G19/04
代理机构
代理人
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