发明名称 |
Вибрационный бур |
摘要 |
|
申请公布号 |
SU64525(A1) |
申请公布日期 |
1944.11.30 |
申请号 |
SU19410044817 |
申请日期 |
1941.06.23 |
申请人 |
SHTURMAN L.I. |
发明人 |
SHTURMAN L.I. |
分类号 |
E21B4/12 |
主分类号 |
E21B4/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
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