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公开(公告)号：US3226806A
公开(公告)日：1966-01-04
申请号：US1602660
申请日：1960-03-18
Applicant: EITEL MCCULLOUGH INC
Inventor： ROBERT GATEWOOD CLYDE
IPC: H01J9/08
CPC classification number: H01J9/08 , Y10T29/49082
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