Tender For corrigendum : supply of ball valves as per mr item 1 , ball valves as per mr item 2 , ball valves as per mr item 3 , ball valves as per mr item 4 , ball valves as per mr item 5 , ball valves as per mr item 6 , ball valves as per mr item 7 , ball valves as per mr item 8 , ball valves as per mr item 9 , ball valves as per mr item 10 , ball valves as per mr item 11 , ball valves as per mr item 12 , ball valves as per mr item 13 , plug valves as per mr item 14 , plug valves as per mr item 15 , plug valves as per mr item 16 , plug valves as per mr item 17