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公开(公告)号:US2502965A
公开(公告)日:1950-04-04
申请号:US59219345
申请日:1945-05-05
Applicant: SOLAR CORP
Inventor: KNAPP ROLAND W
IPC: D06F17/04 , D06F23/04
CPC classification number: D06F23/04 , D06F17/04