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经营范围
发明名称
Automatic slip casing hanger
摘要
申请公布号
GB9713841(D0)
申请公布日期
1997.09.03
申请号
GB19970013841
申请日期
1997.06.30
申请人
FMC CORPORATION
发明人
分类号
E21B33/00;E21B33/04
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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