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发明名称
Improvements in and relating to cathode pay apparatus
摘要
申请公布号
GB537175(A)
申请公布日期
1941.06.12
申请号
GB19390028482
申请日期
1939.10.23
申请人
LEONARD JOSEPH BLUMENTHAL;ADOLF PERELMANN
发明人
分类号
H01J17/14;H01J21/18;H01J31/04
主分类号
H01J17/14
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