Tender For providing of custom bid for services - a annual rate contract for hydrotesting, refilling & painting of co2, fm-200, n2, dcp, argonite, inergen & breathing apparatus cylinder & spares for karnataka region 3170,custom bid for services - b annual rate contract for hydrotesting, refilling & painting of co2, fm-200, n2, dcp, argonite, inergen & breathing apparatus cylinder for maharashtra region 3165,custom bid for services - c annual rate contract for hydrotesting, refilling & painting of co2, fm-200, n2, dcp, argonite, inergen & breathing apparatus cylinder for goa region 3176 (refer tender and sor)