... ,Low energy consumption,Great maneuverability and reliability... SWC hydraulic open-pit rock drilling jumbo is suited for variety of rock ... in heavy construction work e.g.: hydroelectric development, transportation, open-pit mine, quarry, national defense facility etc.·SWC fully hydraulic ... other pneumatic like-product by up to 1/3 to 2/3. ·Robust structure, compact, presenting high capacity of entry ...