Bid For The Purchase Of Ready-Mixed Concrete, Quality Class C 18/21 (Tis. 213 - 2017) According To Specifications Of The Royal Irrigation Department, 1 Item Of Work To Improve The Water Delivery System Of Huai Daed Reservoir Due To The Royal Initiative, Phase 2, Irrigation Area 500 Rai, Chiang Rai Irrigation Project, Rong Chang Subdistrict, Pa Daet District, Chiang Rai Province. (Chiang Rai Center) By Means Of Electronic Bidding.