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公开(公告)号：US2774691A
公开(公告)日：1956-12-18
申请号：US45753054
申请日：1954-09-21
Applicant: SHELL DEV
Inventor： SCHROEDER CARL W , SUMERS ROBERT W
CPC classification number: D06M15/55 , D06M15/39 , Y10S8/08 , Y10T428/31511 , Y10T442/2385 , Y10T442/2393
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