Semsri, Aphichit. “Determination of Optimum Temperature of Barrel Heater forReducing Waste in Plastic Injection Molding Process of Tractor Turn Signal Cover Parts using DMAIC Techniques”. Engineering and Technology Horizons 39, no. 3 (September 29, 2022): 111–130. accessed August 27, 2026. https://ph01.tci-thaijo.org/index.php/lej/article/view/248112.