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公开(公告)号：US2726921A
公开(公告)日：1955-12-13
申请号：US10326249
申请日：1949-07-06
Applicant: SATIVA CORP
Inventor： BURKARDT ANTON F , BOEGLIN EDWARD H
IPC: D01C1/02
CPC classification number: D01C1/02
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