 |
|
socket pipe : 40 phrases in 18 subjects |
| Bridge construction | 1 |
| Caspian | 1 |
| Construction | 2 |
| Firefighting and fire-control systems | 1 |
| Hydraulic engineering | 2 |
| Makarov | 1 |
| Mechanics | 2 |
| Military | 1 |
| Oil / petroleum | 2 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Pipelines | 1 |
| Plastics | 1 |
| Plumbing | 1 |
| Sakhalin S | 1 |
| Technology | 10 |
| Thermal engineering | 3 |
| Welding | 8 |