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发明名称
Straight pull automatic rotary jar
摘要
申请公布号
US2055018(A)
申请公布日期
1936.09.22
申请号
US19340743518
申请日期
1934.09.11
申请人
J. S. BECK
发明人
RAYMOND EDWARD F.
分类号
E21B31/107
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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