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1.发明授权
公开(公告)号：US1792703A
公开(公告)日：1931-02-17
申请号：US38537029
申请日：1929-08-12
Applicant: CHAMPION FIBRE COMPANY
Inventor： PETERSON CLIFFORD E
IPC: D21C7/10
CPC classification number: D21C7/10
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