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发明名称
Schalter fuer schlagwetteranzeigende Grubenlampen
摘要
申请公布号
DE521516(C)
申请公布日期
1931.03.23
申请号
DENDATF066810D
申请日期
申请人
FRIEMANN & WOLF G.M.B.H.
发明人
分类号
F21V33/00;G01N27/16
主分类号
F21V33/00
代理机构
代理人
主权项
地址
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