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经营范围
发明名称
HYDRAULIC ACTUATED WEIGHT SET WELL PACKER
摘要
申请公布号
GB2010943(B)
申请公布日期
1982.01.13
申请号
GB19780036966
申请日期
1978.09.15
申请人
CAMCO INC
发明人
分类号
E21B33/1295;(IPC1-7):E21B33/12;E21B33/12
主分类号
E21B33/1295
代理机构
代理人
主权项
地址
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