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发明名称
Perfectionnements aux lampes de sûreté du type davy, utilisables au fond des mines
摘要
申请公布号
FR996405(A)
申请公布日期
1951.12.19
申请号
FRD996405
申请日期
1949.09.29
申请人
TALERT TALALMANYOKAT ERTEKESITO NEMZETI VALLALAT
发明人
分类号
F21L23/00
主分类号
F21L23/00
代理机构
代理人
主权项
地址
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