servicing / maintenance/replacing of fuel filter, v belt, oil filter and allied work services of dg sets for 603 eme bn,ge 860 ews,503 asc bn,3 idsr,b mess and sata bty power house 2x200 kva,4x160 kva,2x250 kva,1x125 kva,1x82.5 kva,1x1010 kva at karu