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发明名称
Well bore conditioning devices
摘要
申请公布号
US3087550(A)
申请公布日期
1963.04.30
申请号
US19600071736
申请日期
1960.11.25
申请人
TYRRELL JR ROBERT
发明人
JR. ROBERT TYRRELL,
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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