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公开(公告)号：US3542384A
公开(公告)日：1970-11-24
申请号：US3542384D
申请日：1968-07-22
Applicant: KENNETH O SPEED
Inventor： SPEED KENNETH O
IPC: B23B31/20 , C07C201/12 , B23B13/12
CPC classification number: B23B31/208 , Y10T279/3487 , Y10T403/635 , Y10T403/68
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