repair/replacement of coal mills & rc feeder spares (model-bbd-4772) during mini overhauling of unit-7 (250 mw boiler), ptps, hpgcl, panipat.-replacement of transition piece of raw coal chute -a, b, c, d, of coal mill-7ab, cd. 2 replacement of mixing boxes-a,b,c,d & e of coal mill-7ab, cd & ef of unit-7, ptps, panipat 3 replacementof centre feed pipe of mill-7ab, 7cd, & 7ef of , unit-7, ptps, panipat 4 repairing of outlet body of main inlet gates of hot pa ducts of coal mills. 5 replacement of trunion tube liners of mill 7ab & 7 ef of coal mills-7ab,7cd & 7ef. 6 replacementof dp lines of mill 7cd of coal mills- ab & 7ef. 7 repairof raw coal chute with inlet coal reject of mill-7ab, 7cd, & 7ef 8 repair of mill inspection windows at different locations 9 replacement of feeder outlet gate 10 replacement of feeder inlet gate 11 repair of mill discharge assembly of classifier outlet 12 removal of old extra cooling water trench & fabrication & installation of extra cooling water trench of mill ab, cd & ef.