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发明名称
Verfahren zum Erstellen unterirdischer Hohlräume von grossem Querschnitt
摘要
申请公布号
CH445549(A)
申请公布日期
1967.10.31
申请号
CH19670002627
申请日期
1967.02.22
申请人
PRADER AG
发明人
PRADER,DURI;JAEGER,HERMANN;WINDLER,HANSJAKOB
分类号
E21D13/00;(IPC1-7):E01G3/00
主分类号
E21D13/00
代理机构
代理人
主权项
地址
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