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发明名称
INSULATING MATERIAL FOR VACUUM ELECTRIC DEVICES
摘要
申请公布号
CA302292(A)
申请公布日期
1930.07.22
申请号
CAD302292
申请日期
申请人
THE CANADIAN WESTINGHOUSE COMPANY
发明人
JOHN WESLEY MARDEN;FRANK H. DIGGS
分类号
主分类号
代理机构
代理人
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