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发明名称
Sucker-rod hanger
摘要
申请公布号
US1802526(A)
申请公布日期
1931.04.28
申请号
US19280321580
申请日期
1928.11.24
申请人
NEILSON ALBERT H
发明人
NEILSON ALBERT H.
分类号
E21B19/14
主分类号
E21B19/14
代理机构
代理人
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