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公开(公告)号：US2164189A
公开(公告)日：1939-06-27
申请号：US15432137
申请日：1937-07-17
Applicant: SHELL DEV
Inventor： HUND WALTER J , ROWE DONALD H
CPC classification number: C11B3/06 , B01D11/0446 , B01D11/0488 , C11B3/02
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