| 发明名称 |
CORING BITS |
| 摘要 |
|
| 申请公布号 |
ZA7807007(B) |
申请公布日期 |
1980.05.28 |
| 申请号 |
ZA19780007007 |
申请日期 |
1978.12.14 |
| 申请人 |
EDENVALE ENG WORKS LTD |
发明人 |
CONRADI V |
| 分类号 |
E21B;E21C |
主分类号 |
E21B |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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