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公开(公告)号：US1332028A
公开(公告)日：1920-02-24
申请号：US28821419
申请日：1919-04-07
Applicant: COMMERCIAL RES COMPANY
Inventor： VIRGIL COBLENTZ , WALKER HAROLD W
IPC: C07C51/275
CPC classification number: C07C51/275
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