Requirement :
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Comprehensive maintenance (preventive & breakdown) & operational contract including round the clock supervision (ess-01, 02, south portal ess, north portal ess, pumping sets, circulating area, service buildings etc) & work of 11 kv, ventilation, electromechanical (e&m), telecontrol (scada) & telecom system for pir-panjal tunnel t-80 for two years'
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