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公开(公告)号：US1930640A
公开(公告)日：1933-10-17
申请号：US57660031
申请日：1931-11-21
Applicant: FIBRE CONDUIT COMPANY
Inventor： BRADLEY ALONZO B , MARCEL BOLIN
IPC: D21J3/00
CPC classification number: D21J3/00
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