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经营范围
发明名称
Sucker rod
摘要
申请公布号
US1849123(A)
申请公布日期
1932.03.15
申请号
US19300462002
申请日期
1930.06.18
申请人
DARDELET THREADLOCK CORPORATION
发明人
THOMSON ALFRED MORRIS
分类号
E21B17/042
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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