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公开(公告)号：CA473667A
公开(公告)日：1951-05-15
申请号：CA473667D
Applicant: STANDARD OIL DEV CO
Inventor： RUPP WALTER H , HARDING CLARKE T
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公开(公告)号：CA444882A
公开(公告)日：1947-11-04
申请号：CA444882D
Applicant: STANDARD OIL DEV CO
Inventor： HARDING CLARKE T
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