bids are invited for hydro testing and refilling of fire extinguishers hydro testing of co2 fire extinguishers , refilling of co2 fire extinguishers , painting and labelling of co2 fire extinguishers , hydro-testing of abc store pressure type fire extinguisher , refilling of abc store pressure type fire extinguisher , painting and labelling of abc store pressure type fire extinguisher , hydro-testing of mechanical foam store pressure type fire extinguisher , refilling of mechanical foam store pressure type fire extinguisher , painting and labelling of mechanical foam store pressure type fire extinguisher , hydro-testing of water store pressure type fire extinguisher , refilling of water store pressure type fire extinguisher , painting and labelling of water store pressure type fire extinguisher , valve of co2 fire extinguishers as per the is 3224 2021 , valve and pressure gauge of store pressure type fire extinguishers total quantity : 2546