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发明名称
Ring- oder bogenfoermiger Ausbau fuer Grubenstrecken oder Tunnel
摘要
申请公布号
DE960085(C)
申请公布日期
1957.03.14
申请号
DE1956E012007
申请日期
1956.02.24
申请人
HERBERT ERDMANN
发明人
ERDMANN HERBERT
分类号
E21D11/22
主分类号
E21D11/22
代理机构
代理人
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地址
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