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发明名称
Improvements in band-pass filters
摘要
申请公布号
GB462874(A)
申请公布日期
1937.03.17
申请号
GB19360013544
申请日期
1936.05.13
申请人
HAZELTINE CORPORATION
发明人
分类号
H03H7/01
主分类号
H03H7/01
代理机构
代理人
主权项
地址
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