| 发明名称 |
Well shooting |
| 摘要 |
|
| 申请公布号 |
US2921519(A) |
申请公布日期 |
1960.01.19 |
| 申请号 |
US19520287929 |
申请日期 |
1952.05.15 |
| 申请人 |
MARTIN THOMAS B |
发明人 |
MARTIN THOMAS B. |
| 分类号 |
E21B43/263 |
主分类号 |
E21B43/263 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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