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发明名称
Retrieving tool
摘要
申请公布号
US2508286(A)
申请公布日期
1950.05.16
申请号
US19450635235
申请日期
1945.12.15
申请人
OTIS ENGINEERING CORPORATION
发明人
OTIS HERBERT C.
分类号
E21B23/06
主分类号
E21B23/06
代理机构
代理人
主权项
地址
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