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公开(公告)号：US3077856A
公开(公告)日：1963-02-19
申请号：US2320660
申请日：1960-04-19
Applicant: PACKARD BELL ELECTRONICS CORP
Inventor： RICTH HAROLD F
IPC: H03J1/06
CPC classification number: H03J1/06 , Y10S116/30
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