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公开(公告)号：US1966934A
公开(公告)日：1934-07-17
申请号：US53902931
申请日：1931-05-21
Applicant: STANDARD OIL CO
Inventor： SCHEINEMAN FRED W , BENJAMIN FRANKLIN
IPC: E05D13/00
CPC classification number: E05D13/14 , E05Y2900/132
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