internal diameter: 33 phrases in 18 subjects |
Automated equipment | 1 |
Automobiles | 1 |
Cardiology | 1 |
Drilling | 1 |
Energy industry | 2 |
Machine tools | 2 |
Mathematics | 1 |
Mechanics | 2 |
Medical | 2 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Oil and gas | 2 |
Pipelines | 1 |
Roll stock | 2 |
Sakhalin | 1 |
Silicate industry | 3 |
Solar power | 1 |
Technology | 8 |