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公开(公告)号：US3332321A
公开(公告)日：1967-07-25
申请号：US50457365
申请日：1965-10-24
Applicant: JACOBSEN LEIF S
Inventor： JACOBSEN LEIF S
CPC classification number: B23C1/025 , B23Q1/25 , B23Q2701/02 , Y10T409/305376 , Y10T409/309184 , Y10T409/309576
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