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公开(公告)号：US2920951A
公开(公告)日：1960-01-12
申请号：US59262056
申请日：1956-06-20
Applicant: KNAPSACK AG
Inventor： OTTO BRETSCHNEIDER , GERHART JACKEL , KARL ZIEKE
IPC: C22B5/16
CPC classification number: C22B5/16
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