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公开(公告)号：US2871009A
公开(公告)日：1959-01-27
申请号：US49316155
申请日：1955-03-09
Applicant: PICATTI GEORGE G
Inventor： PICATTI GEORGE G
CPC classification number: E05F15/635 , E05F15/41 , E05Y2201/674 , E05Y2400/30 , E05Y2900/132
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