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公开(公告)号：US3089251A
公开(公告)日：1963-05-14
申请号：US81812759
申请日：1959-06-04
Applicant: DORR OLIVER INC
Inventor： FRITZ HELBIG , JUKKOLA WALFRED W
IPC: C22B1/10
CPC classification number: C22B1/10
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