Maintenance And Operation Of Internal & External Electrical Installations At Nth, Complex, Cp Block, Sector-V, Salt Lake, Kolkata Dg. 2026-27. (Sh- Providing Services For Day To Day Maintenance Of Iei, External El & Operation Of Pump Sets, Fire Fighting System, Lifts, Dg Set Etc.). Subwork/Packages:Providing Services For Day To Day Maintenance