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发明名称
élément d'écouteur téléphonique
摘要
申请公布号
FR1030127(A)
申请公布日期
1953.06.10
申请号
FRD1030127
申请日期
1950.12.26
申请人
发明人
DEPAEPE HENRI
分类号
H04R13/02
主分类号
H04R13/02
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代理人
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