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公开(公告)号：US2085843A
公开(公告)日：1937-07-06
申请号：US61818432
申请日：1932-06-20
Applicant: ALLIS CHALMERS MFG CO
Inventor： HAROLD WINOGRAD , KAEGI EMIL M
IPC: H01J13/20
CPC classification number: H01J13/20 , H01J2893/0092
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