Iliev, Georgi, and Hristo Hristov. “SPEED CONTROL OF PNEUMATIC CYLINDERS USING HIGH SPEED 2 PORT ON OFF VALVES WITH PULSE WIDTH MODULATION”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 22, 2024): 95–100. Accessed November 21, 2024. https://journals23.rta.lv/index.php/ETR/article/view/8117.