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公开(公告)号：US1638471A
公开(公告)日：1927-08-09
申请号：US62390123
申请日：1923-03-09
Applicant: ROESSLER & HALSSLACHER CHEMICA
Inventor： RUSSELL CARVETH HECTOR
CPC classification number: C01B13/326 , B01J10/005 , C01G9/02
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