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发明名称
écouteur téléphonique
摘要
申请公布号
FR1142075(A)
申请公布日期
1957.09.13
申请号
FRD1142075
申请日期
1956.02.01
申请人
发明人
GILLET PIERRE-GEORGES
分类号
H04R11/00;H04R11/06
主分类号
H04R11/00
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