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发明名称
Hydraulic switch device
摘要
申请公布号
AU755401(B2)
申请公布日期
2002.12.12
申请号
AU19990061268
申请日期
1999.10.05
申请人
WEATHERFORD/LAMB, INC.
发明人
HENNING HANSEN;FRODE KALAND
分类号
E21B23/00;E21B23/04;E21B34/10;E21B41/00;(IPC1-7):E21B34/10
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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