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公开(公告)号：CA689731A
公开(公告)日：1964-06-30
申请号：CA689731D
Applicant: SHELL OIL CO
Inventor： FRANCIS CHARLES E
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公开(公告)号：CA609693A
公开(公告)日：1960-11-29
申请号：CA609693D
Applicant: SHELL OIL CO
Inventor： FRANCIS CHARLES E , WEAVER JOHN J
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