The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.
丘陵区沟沿线,该区地形地貌特征重要地形结构线。
The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.
丘陵区沟沿线,该区地形地貌特征重要地形结构线。
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