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发明名称
APPARATUS FOR HANGING WELL BORE CASING
摘要
申请公布号
US3489436(A)
申请公布日期
1970.01.13
申请号
USD3489436
申请日期
1965.10.23
申请人
VENTURA TOOL CO.
发明人
ARTHUR G. AHLSTONE
分类号
E21B33/043;E21B33/14;(IPC1-7):F16L55/00;E21B19/10;F16L33/16
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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