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发明名称
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摘要
申请公布号
US1951939(A)
申请公布日期
1934.03.20
申请号
US19300468085
申请日期
1930.07.15
申请人
HEINRICH KONEMANN
发明人
KONEMANN HEINRICH
分类号
G11B7/00
主分类号
G11B7/00
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