Nimnaparoj, T., Chanchai, W., Sutthichienchot, R., Srithanyarat, S., Jindarat, C., Bunnum, .K. , Suksawat, P. and Srisua, S. 2024. Evaluation of the Physical Performance of Chemical Indicators in the Sterilization Process under the Operation of the Pre-Vacuum Pump System of the Steam Sterilizer. Journal of Health Promotion and Environmental Health Research Health Promotion Centre 8 Udon Thani. 2, 4 (Oct. 2024), 52–62.