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发明名称
Колонковое долото
摘要
申请公布号
SU79135(A1)
申请公布日期
1949.11.30
申请号
SU19490396267
申请日期
1949.04.27
申请人
ROSHSHIN P.F.
发明人
ROSHSHIN P.F.
分类号
E21B25/00;E21B49/02;G01N1/08
主分类号
E21B25/00
代理机构
代理人
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地址
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