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公开(公告)号：US2064169A
公开(公告)日：1936-12-15
申请号：US5744436
申请日：1936-01-03
Applicant: SOVEREING MACHINERY COMPANY
Inventor： HENRY KERSHAW
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0026
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