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经营范围
发明名称
Pipe tongs
摘要
申请公布号
US3373638(A)
申请公布日期
1968.03.19
申请号
US19670607783
申请日期
1967.01.06
申请人
THOMAS R. DUNNAM
发明人
DUNNAM THOMAS R.
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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