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发明名称
Gun perforator device
摘要
申请公布号
US2344778(A)
申请公布日期
1944.03.21
申请号
US19430475302
申请日期
1943.02.09
申请人
SHELL DEVELOPMENT COMPANY
发明人
KEPLINGER CHARLES H.
分类号
E21B27/00;E21B43/116
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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