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经营范围
发明名称
Sucker-rod socket
摘要
申请公布号
US1761840(A)
申请公布日期
1930.06.03
申请号
US19280321579
申请日期
1928.11.24
申请人
NEILSON ALBERT H
发明人
NEILSON ALBERT H.
分类号
E21B31/18
主分类号
E21B31/18
代理机构
代理人
主权项
地址
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