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经营范围
发明名称
Hydraulic jar
摘要
申请公布号
SG59929(A1)
申请公布日期
1999.02.22
申请号
SG19960001753
申请日期
1994.12.16
申请人
HOUSTON ENGINEERS, INC.
发明人
ROBERTS BILLY JAMES
分类号
E21B31/113;(IPC1-7):E21B31/107;E21B4/14
主分类号
E21B31/113
代理机构
代理人
主权项
地址
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