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发明名称
Casing guide
摘要
申请公布号
US3177946(A)
申请公布日期
1965.04.13
申请号
US19620210722
申请日期
1962.07.18
申请人
TROJAN, INC.
发明人
SR. JESSE E. HALL,
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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