พรหมชา ภ., -, .-., -, .-., & -, .-. (2022). A Study on the Number of Waste Valves Affecting Pumping Rates of a Hydraulic Ram. The 27th National Convention on Civil Engineering, 27, WRE31–1. Retrieved from https://conference.thaince.org/index.php/ncce27/article/view/1550