... Oct. 2011Pneumatic Rollers (Obtained the IS09001:2000 system Certificate) Features:1,The reliability of its axle ... -driven walking system can be ensured by the disel engine, ... by an electric gear-shifting device.6,Two independent braking system can ensure its. Specification: 1,Mix. ... 4+515,Chearance between axles:3840 mm16,Elextric system:24 V17,Dimensions:5050*2355*3495 mm ( ...