bids are invited for m9438229023- refilling of 99 point 999 percent h2 in 10 lw c cyl , m9438229024- refilling of cal gas 98 point 2 percent h2 bal n2 , m9438389004- refilling of 5ppmo2 and bal n2 o2 anlyzr , m9438096030- cal test gas 99 point 99 percent nitrogen co anlyser , m9438219001- 92 point 2 percent h2 zero gas cylinder 10 lts cap , m9438226067- span gas cylinder 10lts 100 percent h2 , m9438378672- std o2 cal span gas 8 percent cylinder , m9438379003- cal gas o2 analyser 0 point 24percent o2 bal n2 , m9438119001- span gas cy co2 analyser 30 percent co2 , m9438456191- span gas cylinder for nox analyser 10l , m9438456192- span gas cylinder for sox analyser 10l , m9438099004- refilling of cal gas 400 ppm co bal n2 , m9494509049- hydrotesting of 10 ltr w point c gas cylinder , servicing of cylinders , replacement of valve , collection and delivery charges