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发明名称
摘要
申请公布号
NL84062(C)
申请公布日期
1956.09.15
申请号
NL19490147078
申请日期
1949.06.18
申请人
发明人
分类号
H03F1/36;H03K4/39;H03K4/43;H04R3/00
主分类号
H03F1/36
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代理人
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地址
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