Tender For The Purchase Of 61 Items Of Spiral Seam Steel Pipes And Others, Including Stacking And Welding Of Pipes. And Install Accessories For Work On Improving The Lam Phlok Canal Weir Water Pipeline System. Due To The Royal Initiative Trang Irrigation Project, Palian Subdistrict, Palian District, Trang Province, By Means Of Electronic Bidding.