 |
| 环缝: 109 phrases in 23 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Aviation | 3 |
| Bridge construction | 1 |
| Chemistry | 4 |
| Drilling | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| General | 3 |
| Hydroelectric power stations | 2 |
| Latin | 3 |
| Metallurgy | 21 |
| Natural sciences | 1 |
| Nautical | 1 |
| Oil / petroleum | 8 |
| Plastic surgery | 2 |
| Plastics | 4 |
| Skydiving | 1 |
| Space | 3 |
| Technology | 28 |
| Textile industry | 14 |
| Welding | 1 |
| Wind Energy | 1 |
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