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发明名称
Pipe slip
摘要
申请公布号
US2283082(A)
申请公布日期
1942.05.12
申请号
US19410379657
申请日期
1941.02.19
申请人
GEORGE MIETHER
发明人
MIETHER GEORGE
分类号
E21B19/10;E21D15/34
主分类号
E21B19/10
代理机构
代理人
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地址
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