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| 垅作区田 | |||
| 垄作区田 | |||
| 沿等高线种植; 沿等高线栽培; 等高田; 等高畦; 梯田 | |||
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| 等高作畦 | |||
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contour check : 7 phrases in 3 subjects |
| Aviation | 3 |
| Hydroelectric power stations | 2 |
| Water resources | 2 |
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