With the development of urbanization. underground commercial buildings (UCB) are facing severe challenges in fire safety management due to their unique structure and environmental characteristics. This study constructed a fire casualty risk assessment model that combines fuzzy fault tree analysis (FFTA) and Bayesian network (BN). aiming to quantitatively analyze the dynamic risk of ca... https://www.chiggate.com/3m-speedglas-9002nc-welding-helmet-fashion/