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管 螺纹 : 389 phrases in 30 subjects |
| Agriculture | 2 |
| Architecture | 6 |
| Automobiles | 17 |
| Aviation | 30 |
| Bridge construction | 3 |
| Chemistry | 6 |
| Compressors | 8 |
| Construction | 2 |
| Drilling | 17 |
| Earth sciences | 3 |
| Ecology | 3 |
| Electronics | 2 |
| Engineering geology | 1 |
| General | 21 |
| Hydroelectric power stations | 2 |
| Ichthyology | 1 |
| Life sciences | 1 |
| Mechanic engineering | 3 |
| Mechanics | 15 |
| Metallurgy | 19 |
| Nautical | 3 |
| Oil / petroleum | 55 |
| Plastics | 2 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Shipbuilding | 3 |
| Steel production | 1 |
| Surgery | 1 |
| Technology | 158 |
| Wind Energy | 2 |
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