Tender For providing of calibration services - portable gas detectors (calibration of nh3, o2, h2s detectors, multi gas and lel detector); calibration, functional check and maintenance of gas detectors at hurl barauni; as per nit sow; as per nit sow
Tender For corrigendum : calibration of d 6 methanometer, local methane detector, multi gas detector and anemometer of shyamsundarpur colliery under bankola area (retender)