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发明名称
Damm fuer einen Blindschacht
摘要
申请公布号
DE1902010(B1)
申请公布日期
1971.02.25
申请号
DE19691902010
申请日期
1969.01.16
申请人
GELSENBERG AG
发明人
GENTHE MANFRED DR-ING
分类号
E21F1/18
主分类号
E21F1/18
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代理人
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