bids are invited for cement of 43 grade opc in sealed bags each weighing 50 kgs. the date of manufacture of cement should not be more than for narion , sand river sand conforming to is 383- 1970 for narion , crushed stone aggregate 40mm graded conforming to is 383-1970 for narion , cement of 43 grade opc in sealed bags each weighing 50 kgs. the date of manufacture of cement should not be more than for keri , sand river sand conforming to is 383-1970 for keri , crushed stone aggregate 40mm graded conforming to is 383-1970 for keri , cement of 43 grade opc in sealed bags each weighing 50 kgs. the date of manufacture of cement should not be more than for jwg , sand river sand conforming to is 383-1970 for jwg , crushed stone aggregate 40mm graded conforming to is 383-1970 for jwg