Nimnaparoj, T.; Chanchai, W.; Sutthichienchot, R.; Srithanyarat, S.; Jindarat, C.; Bunnum, . K. .; Suksawat, P.; Srisua, S. . 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. Health. Envi. J. 2024, 2, 52-62.