Semsri A. Determination of Optimum Temperature of Barrel Heater forReducing Waste in Plastic Injection Molding Process of Tractor Turn Signal Cover Parts using DMAIC Techniques. Eng. & Technol. Horiz. [internet]. 2022 Sep. 29 [cited 2026 Aug. 27];39(3):111-30. available from: https://ph01.tci-thaijo.org/index.php/lej/article/view/248112