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公开(公告)号：US1601034A
公开(公告)日：1926-09-28
申请号：US42971020
申请日：1920-12-10
Applicant: ANCHOR COMPANY
Inventor： ORLANDO METCALF
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/10
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