Notice on (No. 1650 PC A.K.) Invitation to Bid for Concrete Pouring Works for Roads and Yards, 0.15m thickness, area 398.7m2, and Sand Pouring, area 36.8m2, at Lumphat Electricity Branch; Reinforced Concrete Road Pouring, 1.15m thickness, area 1,049.5m2, and Concrete Pouring for the Front Yard of the Warehouse, 0.15m thickness, area 795m2, at the New Ratanakiri Electricity Site.