发明名称 |
Casing mill |
摘要 |
|
申请公布号 |
US2299528(A) |
申请公布日期 |
1942.10.20 |
申请号 |
US19410411825 |
申请日期 |
1941.09.22 |
申请人 |
CONNER RAY E |
发明人 |
CONNER RAY E. |
分类号 |
E21B29/00 |
主分类号 |
E21B29/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
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