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公开(公告)号：US2206587A
公开(公告)日：1940-07-02
申请号：US22046538
申请日：1938-07-21
Applicant: KAPELLA LTD
Inventor： HERSCHEL TAYLOR MARK
IPC: B23Q17/24
CPC classification number: B23Q17/24 , Y10T409/302856 , Y10T409/302912
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