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经营范围
发明名称
Drill rod coupling
摘要
申请公布号
AU5150199(A)
申请公布日期
2000.01.05
申请号
AU19990051501
申请日期
1999.05.21
申请人
MANNESMANN A.G.
发明人
GERHARD KRUG;ERICH QUADFLIEG
分类号
E21B17/042;F16L15/00;F16L15/04
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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