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公开(公告)号:CA552413A
公开(公告)日:1958-01-28
申请号:CA552413D
Applicant: SHELL DEV
Inventor: TESS ROY W H
公开(公告)号:CA540030A
公开(公告)日:1957-04-23
申请号:CA540030D
Inventor: TESS ROY W H , MIKA THOMAS F