 |
| |||
| surface controlled subsurface safety valve (Yeldar Azanbayev); SCSSV (Yeldar Azanbayev) | |||
| underground safety valve | |||
| подземный клапан-отсекатель: 5 do fraz, 4 tematyki |
| Karaczaganak | 1 |
| Ropa / ropa naftowa | 1 |
| Sachalin | 2 |
| Technika i technologia | 1 |
|
| |||
| surface controlled subsurface safety valve (Yeldar Azanbayev); SCSSV (Yeldar Azanbayev) | |||
| underground safety valve | |||
| подземный клапан-отсекатель: 5 do fraz, 4 tematyki |
| Karaczaganak | 1 |
| Ropa / ropa naftowa | 1 |
| Sachalin | 2 |
| Technika i technologia | 1 |