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发明名称
Verfahren zur Herstellung nahtloser Schallkoerper aus Papier o. dgl.
摘要
申请公布号
DE500610(C)
申请公布日期
1930.06.26
申请号
DENDATB140325D
申请日期
申请人
PAUL BISCHOFF
发明人
分类号
H04R7/12
主分类号
H04R7/12
代理机构
代理人
主权项
地址
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