... operation 3.Full hydraulic pressure operation Detailed Product Descriptionexplosion proof tunnel mucking machine work in big, medium and small size ... Of phosphorite mine,iron mine,lead mine,zinc mine, and tunnel.Structure is compact, volume is small and exquisite, applicable ... to Work in 1.8m x 1.8m tunnel;Multifunctional , shillful, save labour, Working of digging arm, running ...