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发明名称
Прибор для определения твердости проходимых пород при бурении скважин
摘要
申请公布号
SU14858(A1)
申请公布日期
1930.03.31
申请号
SU19290051314
申请日期
1929.07.17
申请人
PERMYAKOV I.G.
发明人
PERMYAKOV I.G.
分类号
G01N3/58
主分类号
G01N3/58
代理机构
代理人
主权项
地址
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