Gem Bids For Refilling Of Industrial Gases In Cylinders - Argon Gascommercial Grade; Cylinders, Refilling Of Industrial Gasesin Cylinders - Dissolved Acetylene Gas As Per Is:308-1988;cylinders, Refilling Of Industrial Gases In Cylinders -oxygen; Cylinders, Refilling Of Industrial Gases In Cylinders- Mixture Gas 1 Methane 10% +argon 90%; Cylinders