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发明名称
Rotary jar
摘要
申请公布号
US2055683(A)
申请公布日期
1936.09.29
申请号
US19350040006
申请日期
1935.09.10
申请人
EDWARDS CHARLES R
发明人
EDWARDS CHARLES R.
分类号
E21B31/113
主分类号
E21B31/113
代理机构
代理人
主权项
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