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公开(公告)号:US2464487A
公开(公告)日:1949-03-15
申请号:US54669144
申请日:1944-07-26
Applicant: STANDARD OIL DEV CO
Inventor: CHAPPELL ROBERT E , BEAMER CLAYTON M , DUFF RALPH B
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公开(公告)号:CA449047A
公开(公告)日:1948-06-08
申请号:CA449047D
Applicant: STANDARD OIL DEV CO
Inventor: CHAPPELL ROBERT E , BEAMER CLAYTON M , DUFF RALPH B
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