Special surface structure the friction and creates more comfortable and safe ground environment for the movement.
特殊的表面结构，增强了摩擦力，创造了更加舒适和安全的运动地面环境。
The ground collapse and cracks caused by underground mining severely threaten the safe in production and destroy the surface environment.
地下采矿引起的地表塌陷和裂缝，严重威胁矿山生产安全，破坏地表生态环境。
Ground collapse will seriously threaten the mine production security and destroy the surface ecological environment.
地表塌陷严重威胁着矿山安全生产，破坏地表生三态环境。
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