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pipe socket : 35 phrases in 17 subjects |
| Automobiles | 1 |
| Bridge construction | 1 |
| Caspian | 1 |
| Construction | 2 |
| General | 1 |
| Hydraulic engineering | 2 |
| Mechanic engineering | 2 |
| Mechanics | 2 |
| Military | 1 |
| Oil / petroleum | 2 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Plumbing | 1 |
| Rail transport | 1 |
| Sakhalin S | 1 |
| Technology | 7 |
| Welding | 8 |