bids are invited for custom bid for services - boq item no 1 high skilled refrigeration mechanic per shift of 08 hours 182 shifts , custom bid for services - boq item no 2 semi skilled refrigeration mechanic per shift of 08 hours 2002 shifts , custom bid for services - boq item no 3 semi skilled refrigeration mechanic per shift of 08 hours 630 shifts , custom bid for services - boq item no 4 un skilled helper per shift of 08 hours 364 shifts , custom bid for services - boq item no 5 supply and fill refrigerant gas r22 183 kgs , custom bid for services - boq item no 6 supply and fill refrigerant gas r134a 407 183 kgs , custom bid for services - boq item no 7 supply only v belts of size a70 10 each , custom bid for services - boq item no 8 supply only v belts of size a81 10 each