Saenthong, Nuttakit. “Effects of Size of Drain Valves on Flow Rate of the Hydraulic Ram Pump Using for Agriculture”. Creative Science 7, no. 2 (December 15, 2015): 106–113. Accessed April 27, 2024. https://ph01.tci-thaijo.org/index.php/snru_journal/article/view/43662.