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公开(公告)号：US2722245A
公开(公告)日：1955-11-01
申请号：US27655952
申请日：1952-03-14
Applicant: CLAMPITT RICHARD C
Inventor： CLAMPITT RICHARD C
CPC classification number: F16N7/32 , B27B13/12 , Y10S29/092 , Y10T83/263
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