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发明名称
PROP TIL LUKNING AF DET INDRE AF ET HULT CYLINDRISK ORGAN
摘要
申请公布号
DK355779(A)
申请公布日期
1980.03.15
申请号
DK19790003557
申请日期
1979.08.24
申请人
HALLIBURTON CO
发明人
STREICH S G
分类号
E21B33/12;F16L55/11;(IPC1-7):E21B/
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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