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发明名称
ELECTRONIC TUBES
摘要
申请公布号
CA471012(A)
申请公布日期
1951.01.23
申请号
CAD471012
申请日期
申请人
CANADIAN WESTINGHOUSE COMPANY
发明人
DAVID H. SLOAN
分类号
主分类号
代理机构
代理人
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