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发明名称
Side wall punch core orienter gun perforator type
摘要
申请公布号
US2873949(A)
申请公布日期
1959.02.17
申请号
US19560625842
申请日期
1956.12.03
申请人
NATLAND MANLEY L
发明人
NATLAND MANLEY L.
分类号
E21B49/04
主分类号
E21B49/04
代理机构
代理人
主权项
地址
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