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发明名称
METHOD AND APPARATUS TO DRILL IN THE SOIL BY DISPLACEMENT
摘要
申请公布号
PT1942247(E)
申请公布日期
2009.05.28
申请号
PT20070000129T
申请日期
2007.01.04
申请人
BAUER MASCHINEN GMBH
发明人
ERWIN EMIL STOETZER;ROBERT WENGER
分类号
E21B7/26;E21B49/00
主分类号
E21B7/26
代理机构
代理人
主权项
地址
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