When change cross fall and stroke still might maintain the surface of bed movement balance; the spring lays aside in box in vivo; the structure is compact, also it could obtain the final ore concentrate and the final debris onetime.

• 在改变横向坡度和冲程时仍可保持床面运行平衡，弹簧放置在箱体内，结构紧凑，且能一次得出最终精矿和最终尾矿。