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发明名称
Perforating device
摘要
申请公布号
US2252270(A)
申请公布日期
1941.08.12
申请号
US19380239015
申请日期
1938.11.05
申请人
AMERICAN OIL TOOL COMPANY
发明人
MILLER LEONIDAS C.
分类号
E21B43/1185
主分类号
E21B43/1185
代理机构
代理人
主权项
地址
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