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配水管: 80 phrases in 14 subjects |
Agriculture | 1 |
Architecture | 3 |
Earth sciences | 1 |
Ecology | 2 |
Electronics | 3 |
Engineering geology | 1 |
Exhibitions | 1 |
Hydroelectric power stations | 10 |
Metallurgy | 1 |
Navigation | 1 |
Oil / petroleum | 2 |
Rail transport | 1 |
Technology | 51 |
Water resources | 2 |