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公开(公告)号：US2958472A
公开(公告)日：1960-11-01
申请号：US62416756
申请日：1956-11-23
Applicant: COMMERCIAL SOLVENTS CORP
Inventor： ERICKSON EDWARD A , NIESCHLAG HENRY J
CPC classification number: B02C19/061 , B02C23/12
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