Tender For repair maintenance of 1600 kva electrical substation equipments of bhasha bhawan, 2 nos. 1000 kva and 1 no. 500 kva electrical substation, 8 nos. dumb waiters in two banks (comprising 4 nos. each bank), 2 nos. 10 passenger, 2 nos. 8 passenger & 1 no. 13 passenger lift at bhasha bhwan, national library complex, kolkata during 2025-26 (sh: through servicing and leak testing, pressure testing with refrigerant gas charging of up to 2.0 tr capacity split type ac machine at control room of national lilbrary belvedere building and computer division of national library new annex building, alipore, kolkata).