Hire a security service Within the area of ​​the Provincial Waterworks Authority, Udon Thani branch, at 444 Village No. 11, Soi Ban Nong Na Kluea, Mak Khaeng Subdistrict, Mueang District, Udon Thani Province, and Ban Nikhom Water Filtration Plant Nikhom Songkhro Subdistrict, Mueang District, Udon Thani Province, No. 4/2565 by electronic bidding method (e-bidding) (EXPIRED)