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经营范围
发明名称
Pipe wiper
摘要
申请公布号
US2648862(A)
申请公布日期
1953.08.18
申请号
US19460672459
申请日期
1946.05.27
申请人
BARNES BYRON H
发明人
BARNES BYRON H.
分类号
E21B33/08
主分类号
E21B33/08
代理机构
代理人
主权项
地址
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