supply of regulating equipment ( atd ) - three pulley type with modified pulley groove ( 3:1 ratio ) regulating equipment ( atd ) - three pulley type with modified pulley groove ( 3:1 ratio ) , regulating equipment ( atd ) - three pulley type with modified pulley groove ( 3:1 ratio ) ( with use of nbc ball bearing 6305 llu ( part-i ) or skf ball bearing 6305-2 rs1 ( part- i ) or fag ball bearing 6305-2rsr ( part-ii ) in regulating equipment ) spec: ti / spc / ohe / atd / 0060 rev.-1 with a&c slip no.1, drw: ti / drg / ohe / atd / rdso / 00001 / 99 / 2, ti-spc-ohe-atd-tdso-00001-99-3. [ warranty period: 30 months after the date of delivery ]