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公开(公告)号：US2536437A
公开(公告)日：1951-01-02
申请号：US71291246
申请日：1946-11-29
Applicant: GRANT LESTER L
Inventor： GRANT LESTER L
CPC classification number: B27B5/181 , B23Q1/68 , Y10T83/546 , Y10T83/626 , Y10T83/7759 , Y10T83/778
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