 |
| Rockwell hardness C: 11 phrases in 8 subjects |
| Drilling | 1 |
| Metallurgy | 3 |
| Polymers | 1 |
| Quality control and standards | 1 |
| Sakhalin | 1 |
| Seismology | 1 |
| Technology | 2 |
| Tengiz | 1 |
|
| Rockwell hardness C: 11 phrases in 8 subjects |
| Drilling | 1 |
| Metallurgy | 3 |
| Polymers | 1 |
| Quality control and standards | 1 |
| Sakhalin | 1 |
| Seismology | 1 |
| Technology | 2 |
| Tengiz | 1 |