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发明名称
Well bore scratcher
摘要
申请公布号
US3018831(A)
申请公布日期
1962.01.30
申请号
US19580749705
申请日期
1958.07.21
申请人
MORGAN GIST FRED
发明人
GIST FRED MORGAN
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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