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公开(公告)号：US3291558A
公开(公告)日：1966-12-13
申请号：US21976362
申请日：1962-08-27
Applicant: DEGUSSA
Inventor： ERICH BADER , KARL-GEORG KOTTENHAHN
IPC: C14C9/00
CPC classification number: C14C9/00
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