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发明名称
摘要
申请公布号
NL69299(C)
申请公布日期
1952.01.15
申请号
NL19480138674
申请日期
1948.02.04
申请人
发明人
分类号
G11B5/004;G11B5/012
主分类号
G11B5/004
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