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经营范围
发明名称
RETRACTABLE WIRE LINE CORE BARREL
摘要
申请公布号
CA820738(A)
申请公布日期
1969.08.19
申请号
CAD820738
申请日期
申请人
ODGERS DRILLING INC.
发明人
WALTER W. SVENDSEN
分类号
主分类号
代理机构
代理人
主权项
地址
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