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公开(公告)号：US1930646A
公开(公告)日：1933-10-17
申请号：US49528730
申请日：1930-11-12
Applicant: FIBRE CONDUIT COMPANY
Inventor： GRAY PHILIP P , WERLE ERNEST E
IPC: D21H17/61
CPC classification number: D21H17/61
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