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申请公布号
SU64250(A1)
申请公布日期
1944.11.30
申请号
SU19390036139
申请日期
1939.09.22
申请人
IVANOV G.P.
发明人
IVANOV G.P.
分类号
H01J1/146
主分类号
H01J1/146
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代理人
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