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发明名称
Vorrichtung zur Bekaempfung von Grubenexplosionen, bei der eine Klappe einen Stromkreis schliesst
摘要
申请公布号
DE569717(C)
申请公布日期
1933.02.07
申请号
DED569717D
申请日期
申请人
FRANZ PAWLIK
发明人
分类号
E21F5/14
主分类号
E21F5/14
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