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公开(公告)号：US2150498A
公开(公告)日：1939-03-14
申请号：US662035
申请日：1935-02-15
Applicant: STANDARD OIL CO
Inventor： LLEWELYN GEDDES RAY , THIELE ERNEST W
IPC: B01D3/18
CPC classification number: B01D3/18
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