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发明名称
Method for making covers for electric discharge tubes
摘要
申请公布号
US2274692(A)
申请公布日期
1942.03.03
申请号
US19400351850
申请日期
1940.08.08
申请人
FERNSEH G. M. B. H.
发明人
HEIM MAX
分类号
H01J31/26
主分类号
H01J31/26
代理机构
代理人
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