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经营范围
发明名称
Well pipe protector
摘要
申请公布号
GB838594(A)
申请公布日期
1960.06.22
申请号
GB19580040055
申请日期
1958.12.11
申请人
CHARLES HASKELL COLLETT
发明人
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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