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公开(公告)号：US3168373A
公开(公告)日：1965-02-02
申请号：US7671060
申请日：1960-12-19
Applicant: KNAPSACK AG
Inventor： GERHARD HARTLAPP , WALDEMAR BIELENBERG , COLOGNE KLETTENBERG , HARRI KRIBBE , KLAUS BELTZ , FRIEDRICH THOMAS
IPC: C01B25/30
CPC classification number: C01B25/30
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