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经营范围
发明名称
Perfectionnements apportés aux cornets acoustiques
摘要
申请公布号
FR844769(A)
申请公布日期
1939.08.01
申请号
FRD844769
申请日期
1934.03.20
申请人
发明人
MABBOUX
分类号
G10K11/28
主分类号
G10K11/28
代理机构
代理人
主权项
地址
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