... 3.Full hydraulic pressure operation 4.diggling arm machine Detailed Product Descriptionexplosion proof tunnel mucking machine work in big, medium and small size ... tunnel;Multifunctional , shillful, save labour, Working of digging arm, running of whole machine,up and down of Transport frame are hydraulic controlled ... . ground clearance (MM)200200Loading capacity per hour(T)2040 Digging arm machine