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发明名称
Répétiteur téléphonique
摘要
申请公布号
FR756725(A)
申请公布日期
1933.12.14
申请号
FRD756725
申请日期
1933.06.09
申请人
发明人
RICCHIARDI PIER CARLO
分类号
B03C7/08;H04M1/65;H04M1/652
主分类号
B03C7/08
代理机构
代理人
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