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公开(公告)号:CA494908A
公开(公告)日:1953-07-28
申请号:CA494908D
Applicant: STANDARD OIL DEV CO
Inventor: VESTERDAL HANS G
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公开(公告)号:CA424007A
公开(公告)日:1944-11-21
申请号:CA424007D
Applicant: STANDARD OIL DEV CO
Inventor: VESTERDAL HANS G
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公开(公告)号:CA427878A
公开(公告)日:1945-05-29
申请号:CA427878D
Applicant: STANDARD OIL DEV CO
Inventor: VESTERDAL HANS G
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