Kiatcharoenpol, Tossapol, Wanchai Rattanapakdee, and Sakon Klongboonjit. 2023. “Lean Production for Reducing Wastes in Convex Lens Production Process ”. International Journal of Membrane Science and Technology 10 (2):1023-32. https://doi.org/10.15379/ijmst.v10i2.1408.