Tender For corrigendum : tender for supply of mass flowmeter ( coriolis) -supply for group a , mandatory spares for group a , supervision charges for group a , supply for group b , mandatory spares for group b , supervision charges for group b , supply for group c , mandatory spares for group c , supervision charges for group c , supply for group d , mandatory spares for group d , supervision charges for group d , supply for group e , mandatory spares for group e , supervision charges for group e