... ,easy to operation 3.Full hydraulic pressure operation 4.diggling arm machine Detailed Product Descriptionexplosion proof tunnel mucking machine work in ... 1.8m tunnel;Multifunctional , shillful, save labour, Working of digging arm, running of whole machine,up and down of Transport frame ... . ground clearance (MM)200200Loading capacity per hour(T)2040 Digging arm machine