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发明名称
AUSBAUELEMENT FUER DEN SCHACHTAUSBAU ODER DERGLEICHEN UND VERFAHREN ZU SEINER HERSTELLUNG
摘要
申请公布号
DE2522789(B2)
申请公布日期
1977.04.28
申请号
DE19752522789
申请日期
1975.05.22
申请人
发明人
分类号
E21D11/08;(IPC1-7):21D11/00
主分类号
E21D11/08
代理机构
代理人
主权项
地址
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