Bidding For The Purchase Of 3 Items Of Square-Shaped Prestressed Concrete Piles, Size 0.18X0.18 M. And Length 11.00 M. (Tis 396-2006), Including Pile Driving And Chiseling, And Other Materials For The Improvement Of The Kao Chang Water Gate And Accompanying Buildings, A Project To Increase The Efficiency Of Water Management In The Kao Chang Water Gate Area, Sing Buri Province, By Electronic Bidding.