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发明名称
Verfahren zum Verhindern des Austritts von umweltschädlichen Stoffen bei Unterwasserbohrungen und Rohrstrang hierfür
摘要
申请公布号
DE112011102303(A5)
申请公布日期
2013.04.25
申请号
DE201111102303T
申请日期
2011.07.05
申请人
DERWAND, HELMUT
发明人
DERWAND, HELMUT
分类号
E21B17/01;E21B21/08
主分类号
E21B17/01
代理机构
代理人
主权项
地址
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