Discussion on the evaluation of radiation protection of “four-in-one” dental X-ray equipment
XU Hui, ZHAO Xipeng, FENG Zechen, YUE Baorong, LIU Guoqing
Chinese Journal of Radiological Health . 2023, (3): 322 -327 .  DOI: 10.13491/j.issn.1004-714X.2023.03.019