supply of 1) transportation charges for refilling of medical oxygen gas in cylinder of capacity 7000l for a period of three years on as and when required basis 2) transportation charges for refilling of medical oxygen gas in cylinder of capacity 7000l for a period of three years on as and when required basis1) transportation charges for refilling of medical oxygen gas in cylinder of capacity 7000l for a period of three years on as and when required basis 2) transportation charges for refilling of medical oxygen gas in cylinder of capacity 7000l for a period of three years on as and when required basis,refilling of medical oxygen gas in cylinder of capacity 7000l for a period of three years on as and when required basis [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , transportation charges for refilling of medical oxygen gas in cylinder of capacity 7000l for a period of three years on as and when required basis [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]