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缓斜坡煤层
meaning in Chinese
gently inclined seam
Related Words
煤层尖灭
斜坡地形
缓射
缓燃
缓卫
缓利
缓凝
缓诘
缓斜面
缓检年限
缓斜坡
缓斜坡海岸
缓斜膛线
缓斜纹
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