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发明名称
Oil saver and rod stripper
摘要
申请公布号
US2345815(A)
申请公布日期
1944.04.04
申请号
US19410391432
申请日期
1941.05.01
申请人
HARROUN BYRON A
发明人
HARROUN BYRON A.
分类号
E21B33/08
主分类号
E21B33/08
代理机构
代理人
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地址
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