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发明名称
Dispositif pour isolation acoustique et phonique de la tête de personnes au repos
摘要
申请公布号
FR1342264(A)
申请公布日期
1963.11.08
申请号
FR19625918096
申请日期
1962.09.26
申请人
发明人
TESTART LOUIS RAYMOND
分类号
A47C21/00;A61M21/00
主分类号
A47C21/00
代理机构
代理人
主权项
地址
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