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公开(公告)号：US2651731A
公开(公告)日：1953-09-08
申请号：US20900251
申请日：1951-02-02
Applicant: JAMES KNIGHTS COMPANY
Inventor： OVERBEY ERNEST E , HOLMBECK JOHN D
IPC: H03H9/08
CPC classification number: H03H9/08
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