cross flight
埋刮板输送机在垂直提升时，物料受到刮板链条在运动方向的压力，在物料中产生了横方向的侧面压力，形成了物料的内摩擦力。
Buried scraper conveyor in horizontal transmission materials, and scraper chain in the direction of the pressure and material, its weight in the materials produced in the friction.
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模块上移
模块下移
不移动