PWD invites e-tenders for annual maintenance of the fire detection system installed at IBTM & IH, Maniktala under NKHESD. Tender ID: 2026_WBPWD_5016863_1 Bid Closing Date: 27 July 2026, 01:00 PM Contact Details: S. Chakraborty, Executive Engineer, KNHED, PWD Website: WB Tenders Portal Location: Maniktala, Kolkata, West Bengal