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经营范围
发明名称
SLIP GRIPPING MECHANISM
摘要
申请公布号
AR243636(A1)
申请公布日期
1993.08.31
申请号
AR19870307540
申请日期
1987.05.03
申请人
HUGHES TOOL COMPANY
发明人
分类号
E21B23/01;E21B23/04;F16D1/02;(IPC1-7):E21B17/16;F16L33/12;F16L55/17
主分类号
E21B23/01
代理机构
代理人
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地址
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