annual maintenance contract of smps based battery charger 48v/25a ( 2+1) for ofc at adst,mug,tlo,khn,pda,slg,boi,dbp,mym,rslr,plae,deh,siu,jit,bgae,soae,gpae,abka,bgra,dtae,same,klnt,ndae,bfz,psae,mtfa,lkx,ptae,agae,dhae,kwae,ngf,tbb,klp,gman,bdag/lc and