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公开(公告)号：US1992566A
公开(公告)日：1935-02-26
申请号：US64352232
申请日：1932-11-19
Applicant: EMILE BRINER , HENRI WAKKER CHARLES
Inventor： EMILE BRINER , HENRI WAKKER CHARLES
IPC: C01B21/20
CPC classification number: C01B21/203 , Y10S422/904
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