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发明名称
Колонковое долото
摘要
申请公布号
SU95959(A1)
申请公布日期
1952.11.30
申请号
SU19500417026
申请日期
1950.04.26
申请人
GOSUDARSTVENNOE SPETSIALNOE KONSTRUKTORSKOE BYURO&NUMERO, 2 MINISTERSTVA NEFTYANOJ PROMYSHLENNOSTI
发明人
分类号
E21B10/06;E21B25/00;E21B49/02;G01N1/08
主分类号
E21B10/06
代理机构
代理人
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