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河道 | |||
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河段 |
river course : 50 phrases in 11 subjects |
Agriculture | 1 |
Bridge construction | 5 |
China | 5 |
Desert science | 2 |
Ecology | 1 |
Engineering geology | 2 |
General | 3 |
Hydroelectric power stations | 6 |
Oil / petroleum | 3 |
Rail transport | 1 |
Technology | 21 |