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公开(公告)号：US1687992A
公开(公告)日：1928-10-16
申请号：US11263826
申请日：1926-05-29
Applicant: GRAY PROCESSES CORP
Inventor： PHILLIPS ERNEST B , STAFFORD JAMES G
IPC: C10G29/12
CPC classification number: C10G29/12
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