bids are invited for mining lab, kata thermometer , wet and dry bulb hygrometer , whirling hygrometer , axial flow fan study model , centrifugal fan study model , ventilation system in bord and pillar model , anemometer , air crossing models , flame safety lamp , velox gl 50 , magnetic unlocker , tool kit , flp flame proof light , pipette aspirator vacuum bottles , gas testing chamber with indicator , velometer digital , digital manometer , inclined manometer , ventilation pressure survey set , magnehelic pressure gauge 0 to 500pa , magnehelic pressure gauge 0 to 250pa , magnehelic pressure gauge 0 to 60pa , pitot tube , u tube manometer , smoke tube with aspirator , stop watch digital , stop watch analog , personal dust sampler with rotometer , dgital barometer , aneroid barometer , fortins barometer , wall thermometer , aerosol monitor total quantity : 48