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发明名称
Verfahren zur Herstellung eines unterirdischen Hohlraumes
摘要
申请公布号
DE1801140(A1)
申请公布日期
1970.04.16
申请号
DE19681801140
申请日期
1968.10.04
申请人
AUGUST THYSSEN-HUETTE AG
发明人
分类号
E21D13/00
主分类号
E21D13/00
代理机构
代理人
主权项
地址
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