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发明名称
ELECTRODE STRUCTURE FOR VACUUM TUBE
摘要
申请公布号
CA493089(A)
申请公布日期
1953.05.26
申请号
CAD493089
申请日期
申请人
PAUL A. KENNEBECK
发明人
PAUL A. KENNEBECK
分类号
主分类号
代理机构
代理人
主权项
地址
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