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发明名称
Долото
摘要
申请公布号
SU59798(A1)
申请公布日期
1940.11.30
申请号
SU19390023787
申请日期
1939.05.04
申请人
LEBEDEV A.G.
发明人
LEBEDEV A.G.
分类号
E21B10/42
主分类号
E21B10/42
代理机构
代理人
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