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公开(公告)号：US2653177A
公开(公告)日：1953-09-22
申请号：US9728749
申请日：1949-06-04
Applicant: CALIFORNIA RESEARCH CORP
Inventor： KEMP JACOB D , ZEH HENRY P
CPC classification number: B01J27/16 , C23F11/04 , Y10S585/95
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