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发明名称
Elektrische Grubenlampe
摘要
申请公布号
DE489009(C)
申请公布日期
1930.01.11
申请号
DE1928F066732D
申请日期
1928.08.31
申请人
FRIEMANN & WOLF G.M.B.H.
发明人
分类号
F21L4/00;F21V25/02
主分类号
F21L4/00
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代理人
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