procurement of 04 sets of hi-chrome grinding elements with buy back for 10e10 coal mill of stg-i boiler along with buy back provision under bmd at bktps. , grinding ring, top, indigeneous for ball mill 10e10 , initial depth of ring-105 mmadditional data:mat. high chrome , grinding ball , indigeneous, 770 to 774 mm for ball mill 10e10 ( 1 set=10 balls ) , ball od: 770-774 mm, id: 520 mmadditional data:mat. high chrome , grinding ring, bottom, indegenious for ball mill 10e10 , initial depth of ring 100 mm.ms, band ( dimension 25 mm thick x100 mm width ) is required t o be shrink fit with bottom grinding ring for fixing of rotary throat additional data:mat. high chrome , grinding ball, fill in, indigeneous for ball mill 10e10 size, 699 to 702 mm, ball od: 699-702 mm, id 520 mmadditional data:mat. high chrome , buy-back price of used grinding elements ( 1 set of grinding element comprising 1 no. worn out top ring & 1 no. worn out bottom ring and 11 nos. of worn out balls. )