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发明名称
ELECTROMAGNETIC DEVICE IMPEDANCE ADJUSTING MEANS
摘要
申请公布号
CA406855(A)
申请公布日期
1942.08.18
申请号
CAD406855
申请日期
申请人
UNION SWITCH AND SIGNAL COMPANY
发明人
CONRAD H. ZIERDT
分类号
主分类号
代理机构
代理人
主权项
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