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公开(公告)号：CA442962A
公开(公告)日：1947-07-15
申请号：CA442962D
Applicant: STANDARD OIL DEV CO
Inventor： FROLICH PER K , LIGHTBOWN IRVING E
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公开(公告)号：CA345547A
公开(公告)日：1934-10-23
申请号：CA345547D
Applicant: STANDARD OIL DEV CO
Inventor： FROLICH PER K
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