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经营范围
发明名称
PIPE ALIGNMENT APPARATUS
摘要
申请公布号
US3554278(A)
申请公布日期
1971.01.12
申请号
USD3554278
申请日期
1969.07.31
申请人
ESSO PRODUCTION RESEARCH CO.
发明人
CARL E. REISTLE;THOMAS W. CHILDERS
分类号
E21B17/10;E21B33/047;E21B33/064;(IPC1-7):E21B33/06
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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