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发明名称
Perfectionnement apporté dans l'établissement des diaphragmes pour hauts-parleurs et autres reproducteurs de sons, et produit industriel nouveau
摘要
申请公布号
FR805224(A)
申请公布日期
1936.11.14
申请号
FRD805224
申请日期
1936.04.22
申请人
发明人
LAFFINEUR ANDRE
分类号
H04R7/12
主分类号
H04R7/12
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