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发明名称
Grappling tool
摘要
申请公布号
US2743130(A)
申请公布日期
1956.04.24
申请号
US19540455815
申请日期
1954.09.14
申请人
OSMUN DEAN W
发明人
OSMUN DEAN W.
分类号
E21B31/18
主分类号
E21B31/18
代理机构
代理人
主权项
地址
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