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发明名称
Perfectionnements aux avertisseurs sonores
摘要
申请公布号
FR784769(A)
申请公布日期
1935.07.24
申请号
FRD784769
申请日期
1934.04.18
申请人
发明人
GAUTHIER PIERRE
分类号
G10K9/02
主分类号
G10K9/02
代理机构
代理人
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