Phongphattarawut, Worapong, Supatthra Muparang, Noppharit Wasanbongngem, Jittiwat Nithikarnjanatharn, and Wannisa Nutkhum. 2024. “Comparison of Polypropylene Flow Index to Increase Injection Efficiency In Plastic Injection Mold, 2 Cavities of Different Shapes Plastic (Case Study : Pencil Box)”. RMUTL Engineering Journal 9 (2):21-29. https://doi.org/10.14456/rmutlengj.2024.11.