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发明名称
Шарошка с составным зубчатым венцом для буров большого диаметра
摘要
申请公布号
SU112212(A1)
申请公布日期
1957.11.30
申请号
SU19570572684
申请日期
1957.02.22
申请人
SILENOK YU.G.
发明人
SILENOK YU.G.
分类号
E21B10/08;E21D1/06
主分类号
E21B10/08
代理机构
代理人
主权项
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