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经营范围
发明名称
Lampe de sécurité contre les coups de grisou
摘要
申请公布号
FR838875(A)
申请公布日期
1939.03.17
申请号
FRD838875
申请日期
1938.06.03
申请人
FRIEMANN & WOLF G.M.B.H.
发明人
分类号
F21L13/02
主分类号
F21L13/02
代理机构
代理人
主权项
地址
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