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发明名称
WELLHEAD STABILIZING MEMBER
摘要
申请公布号
GB8726386(D0)
申请公布日期
1987.12.16
申请号
GB19870026386
申请日期
1987.11.11
申请人
HUGHES TOOL CO
发明人
分类号
E21B33/043
主分类号
E21B33/043
代理机构
代理人
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