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发明名称
Pipe spinner
摘要
申请公布号
US2302249(A)
申请公布日期
1942.11.17
申请号
US19400326076
申请日期
1940.03.26
申请人
PENFIELD CLAIRE A
发明人
PENFIELD CLAIRE A.
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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