機器
auto
bacteria
beware
biohazard
biologic
biological
biology
biosafety
bus
car
caution
chemical
chemistry
cleaner
danger
dangerous
disinfect
disinfectant
equipment
examination
harmful
hazard
hazardous
healthcare
human
illustration
infectious
lab
laboratory
nuclear
person
precaution
public
radiation
safe
safety
service
sprayer
study
substances
suit
tool
truck
vehicle
virus
warn
work
worker