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公开(公告)号：US3024185A
公开(公告)日：1962-03-06
申请号：US75273858
申请日：1958-08-04
Applicant: FLECK HARRY D
Inventor： FLECK HARRY D
IPC: C01B13/11
CPC classification number: C01B13/11 , C01B2201/14 , C01B2201/72
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