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发明名称
Sucker-rod coupling
摘要
申请公布号
US1787831(A)
申请公布日期
1931.01.06
申请号
US19280292755
申请日期
1928.07.14
申请人
MORUE GEORGE C
发明人
MORUE GEORGE C.
分类号
E21B17/046
主分类号
E21B17/046
代理机构
代理人
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