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发明名称
Skrutang
摘要
申请公布号
NO20021924(A)
申请公布日期
2002.07.03
申请号
NO20020001924
申请日期
2002.04.24
申请人
WEATHERFORD/LAMB INC
发明人
PIETRAS, BERND-GEORG
分类号
E21B19/16;(IPC1-7):E21B19/16
主分类号
E21B19/16
代理机构
代理人
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地址
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