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经营范围
发明名称
DRILL BIT
摘要
申请公布号
SU1189986(A1)
申请公布日期
1985.11.07
申请号
SU19843726624
申请日期
1984.04.13
申请人
NII PROMYSHLENNOGO STROITELSTVA
发明人
MAKAROV VIKTOR N,SU;DOROVSKIKH ALEKSEJ S,SU;BABAMUKHAMETOV AMIR S,SU
分类号
E21B7/24;(IPC1-7):E21B7/24
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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