Repair / Rebuilding For Welding Of 2 Nos. Idler Assly And 2 Nos. Sprocket Assly. Repairing Rebuilding Of 2 Nos. Idler Assly And 2 Nos Sprocket Assly Of Tata Hitachi 1900 Vi Exc2776 11 Cu.M Hydraulic Shovel Working At Bina Project Work To Be Carried Out At Ncl Site.