... 3.Full hydraulic pressure operation Detailed Product Descriptionexplosion proof tunnel mucking machine work in big, medium and small size ... big, medium and small size Of phosphorite mine,iron mine,lead mine,zinc mine, and tunnel.Structure is compact, volume is ... 8m x 1.8m tunnel;Multifunctional , shillful, save labour, Working of digging arm, running of whole machine,up and down of Transport frame are ...