Btps-Chp-Preventive And Breakdown Maintenance Of Gear Box/ Couplings/ Scoop Couplings For The Conveyors Bcn-4A/B 5A/B, Bcn 10, 6A/B, 7A/B And Tripper As And When Required In Mm-Iii Sub Division Of Mm/Chp/Btps For The Period From 01.04.2026 Or Actual Date Of Commencement Of Work To 31.03.2027.