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经营范围
发明名称
DRILLING TOOL WITH A CONVEYING SPIRAL
摘要
申请公布号
EP0347601(B1)
申请公布日期
1992.12.09
申请号
EP19890109302
申请日期
1989.05.23
申请人
HAWERA PROBST GMBH + CO.
发明人
MOSER, BERNHARD
分类号
E21B10/44;E21B17/07;E21B17/22
主分类号
E21B10/44
代理机构
代理人
主权项
地址
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