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公开(公告)号：US1893239A
公开(公告)日：1933-01-03
申请号：US51221231
申请日：1931-01-29
Applicant: CELANESE CORP
Inventor： ALBERT MELLOR , TELFER MCLELLAN DAVID
IPC: D06P1/32
CPC classification number: D06P1/32
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