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公开(公告)号：US1899627A
公开(公告)日：1933-02-28
申请号：US55818731
申请日：1931-08-19
Applicant: CHAMPION FIBRE COMPANY
Inventor： MILLER CLARENCE E
IPC: C01D1/42
CPC classification number: C01D1/42 , Y10S159/34
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