The slope-sliding of Union Valley Open Pit Mine began at the mine development stage.
团结沟露天矿从基建时起即开始滑坡。
The gentle slope type slope break belt controlled the development of the fan delta system.
断阶型缓坡坡折带控制着扇三角洲沉积体系的形成和分布；
The gentle slope type slope break belt controlled the development of the fan delta system.
断阶型缓坡坡折带控制着扇三角洲沉积体系的形成和分布；
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