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经营范围
发明名称
TETNING FOR ROERKOPLING.
摘要
申请公布号
NO863236(A)
申请公布日期
1987.02.27
申请号
NO19860003236
申请日期
1986.08.12
申请人
HUGHES TOOL COMPANY
发明人
REGAN, ALBERT MICHAEL
分类号
E21B33/00;E21B33/038;E21B33/043;E21B33/10;F16J15/32;(IPC1-7):E21B/
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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