| 发明名称 |
MULTICONE DRILLING BIT |
| 摘要 |
|
| 申请公布号 |
SU1670086(A1) |
申请公布日期 |
1991.08.15 |
| 申请号 |
SU19884418952 |
申请日期 |
1988.05.03 |
| 申请人 |
VNII BUROVOJ TEKHNIKI |
发明人 |
POPOV ALEKSANDR N,SU |
| 分类号 |
E21B10/32 |
主分类号 |
E21B10/32 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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