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发明名称
ELECTRONIC VALVE CIRCUITS
摘要
申请公布号
CA522736(A)
申请公布日期
1956.03.13
申请号
CAD522736
申请日期
申请人
NATIONAL RESEARCH DEVELOPMENT CORPORATION
发明人
FRANK H. WELLS
分类号
主分类号
代理机构
代理人
主权项
地址
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