Tender For providing of repair and overhauling service - l 1497 defect rectification of ais; ais antenna; no; buyer premises,repair and overhauling service - defect rectification of l 1501 ventilation fan; ventilationsystem; no; buyer premises,repair and overhauling service - l-1502 calibration of test eqpt through nabl approved lab; test equipment; no; buyer premises