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公开(公告)号：US3306604A
公开(公告)日：1967-02-28
申请号：US40850964
申请日：1964-11-03
Applicant: CHRISTENSEN HARRY N
Inventor： CHRISTENSEN HARRY N
CPC classification number: B25B1/2405 , B25B1/10 , B25B1/103 , B25B5/10 , Y10T408/5623
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