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公开(公告)号：US3052951A
公开(公告)日：1962-09-11
申请号：US79641159
申请日：1959-03-02
Applicant: AGENCY IND SCIENCE TECHN
Inventor： MASAO KUBOTA
IPC: B23B27/00
CPC classification number: B23B27/005 , Y10T407/28
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