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公开(公告)号：US2690965A
公开(公告)日：1954-10-05
申请号：US35204253
申请日：1953-04-29
Applicant: STANDARD OIL DEV CO
Inventor： EARL EMOND ROBERT , GRANT MOFFAT FRANCIS
IPC: A01N61/02
CPC classification number: A01N61/02
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