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发明名称
Improvements in variable attenuators of electric signals
摘要
申请公布号
GB482103(A)
申请公布日期
1938.03.23
申请号
GB19370021934
申请日期
1937.08.09
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H03G11/02;H03K17/74
主分类号
H03G11/02
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