根据地理情况前进后退与提升大臂，动作要灵活，料斗内如有大块石头、泥巴等一定要清理。
Retrocedes according to the geography situation advance and promotes the big arm, the movement to be nimble, in the hopper like has the large stone, the mud and so on certainly to clean up.
根据地理情况前进后退与提升大臂，动作要灵活，料斗内如有大块石头、泥巴等一定要清理。
Retrocedes according to the geography situation advance and promotes the big arm, the movement to be nimble, in the hopper like has the large stone, the mud and so on certainly to clean up.
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