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公开(公告)号：US2888329A
公开(公告)日：1959-05-26
申请号：US52759455
申请日：1955-08-10
Applicant: FMC CORP
Inventor： TIMMERMAN ROBERT W , KUTZ HARRY C
IPC: C01B31/26
CPC classification number: C01B32/70
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