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发明名称
摘要
申请公布号
BG21164(A1)
申请公布日期
1976.03.20
申请号
BG19740028194
申请日期
1974.11.15
申请人
发明人
分类号
H03F3/30;(IPC1-7):H03F3/30
主分类号
H03F3/30
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代理人
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地址
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