老采空区上方地表变形是一个具有复杂性、突然性和长期性等显著特点的非线性过程。
Deformation of ground surface above old mine goaf is a complex nonlinear process, which has complex, sudden, and long-term features.
老采空区上方地表变形是一个具有复杂性、突然性和长期性等显著特点的非线性过程。
Deformation of ground surface above old mine goaf is a complex nonlinear process, which has complex, sudden, and long-term features.
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