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发明名称
Способ формирования рабочей части бурового инструмента
摘要
申请公布号
SU143758(A1)
申请公布日期
1961.11.30
申请号
SU19610729098
申请日期
1961.05.05
申请人
发明人
ROMANTSEV YA.A.
分类号
E21B10/46
主分类号
E21B10/46
代理机构
代理人
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