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公开(公告)号:US2320284A
公开(公告)日:1943-05-25
申请号:US29146039
申请日:1939-08-23
Applicant: STANDARD OIL DEV CO
Inventor: KREBS ROBERT W , NICHOLSON EDWARD W
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公开(公告)号:US2244018A
公开(公告)日:1941-06-03
申请号:US27715639
申请日:1939-06-03
Applicant: STANDARD OIL DEV CO
Inventor: MUNDAY JOHN C , NICHOLSON EDWARD W
IPC: B01J20/12
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