"Hazard symbol#Radioactive_trefoil_symbol" . . "Hazard symbol" . "Hazard symbol#Ionizing radiation symbol" . "Hazard symbol" . "radiation warning" . "Hazard symbols" . . "hazard signs" . "hazard symbol" . . . . "Hazard symbol#Radioactive sign" . . "trefoil" . . "Hazard_symbol#Radioactive_sign" . "hazard symbol#Radioactive sign" . "Hazard symbol#Radioactive_sign" . "biohazard symbol" . "Hazard symbol#Biohazard sign" . "safety symbols" . "Hazard_symbol#Radioactive_trefoil_symbol" . . "Ionizing radiation hazard trefoil" . "Hazard symbol#Ionizing radiation trefoil warning symbol" . . . . . "Hazard symbol#Biohazard symbol" . . "safety warning" . . . . . "fallout symbol" . "warning symbols" . . . "Hazard symbol#Biohazard_sign" . "Biological hazard trefoil" . . "its associated symbol" . "Hazard symbol#ISO 21482" . "Hazard symbol#Chemical symbols" . "Biohazard" .