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公开(公告)号：US2637352A
公开(公告)日：1953-05-05
申请号：US15355450
申请日：1950-04-03
Applicant: JOHN WIDDICOMB COMPANY
Inventor： REED ROBERT G , CROWLEY FRANCIS C
CPC classification number: B23D45/042 , B23D45/10 , B23Q16/00 , B27B25/00 , B27M3/18 , Y10T83/4516 , Y10T83/748
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