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公开(公告)号：US2693878A
公开(公告)日：1954-11-09
申请号：US25380251
申请日：1951-10-30
Applicant: STAMICARBON
Inventor： DRIESSEN ANTJE G , FONTEIN FREERK J
IPC: B03B5/34
CPC classification number: B03B5/34
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