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supply water pipe : 40 phrases in 11 subjects |
| Angling hobby | 1 |
| Aviation | 1 |
| China | 2 |
| Electric machinery | 3 |
| Engineering geology | 1 |
| Hydroelectric power stations | 5 |
| Metallurgy | 3 |
| Rail transport | 3 |
| Refrigeration | 1 |
| Technology | 19 |
| Water resources | 1 |
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