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发明名称
Aus Wassertroegen bestehende Explosionssperre fuer den Untertagebergbau
摘要
申请公布号
DE1483996(A1)
申请公布日期
1969.02.13
申请号
DE19661483996
申请日期
1966.05.11
申请人
FA. WILHELM LEPPAK
发明人
LEPPAK,WILHELM
分类号
E21F5/14
主分类号
E21F5/14
代理机构
代理人
主权项
地址
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