MOEI and Fan including sub- station, compound light, lift, Fire fitting etc. at NSSO Building and Guest House of NSO at Mahalanobish Bhavan 164 GLT Road, Kolkata- 108 during 2024- 25. MOEI and Fan including sub- station, Fire fightung etc. at NSSO Building and Guest house of NSO at Mahalanobish Bhavan 164 GLT Road, Kolkata- 108 during 2024- 25.