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发明名称
Ложковый бур
摘要
申请公布号
SU72115(A1)
申请公布日期
1947.11.30
申请号
SU19400306921
申请日期
1940.09.05
申请人
KARAMNOV L.S.
发明人
KARAMNOV L.S.
分类号
E21B10/00
主分类号
E21B10/00
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代理人
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