Supply Of Compressed Oxygen Gas For Industrial Use Confirming To Is: 309/2005 Fourth Revision As Per General Technical Requirement. Warranty Period: 30 Months After The Date Of Delivery Dissolved Acetylene Gas Confirming To Is: 308/1988 With Amendment No.1 Real Firmed 2005 And As Per General Technical Requirement Warranty Period: 30 Months After The Date Of Delivery