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发明名称
Casing scraper
摘要
申请公布号
US2627925(A)
申请公布日期
1953.02.10
申请号
US19500145001
申请日期
1950.02.18
申请人
SCIVALLY BERNICE M
发明人
SCIVALLY BERNICE M.
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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