機器
automatic
breath
care
conveyor
coronavirus
covid19
device
disease
engineering
epidemic
equipment
face
factory
flu
health
hygiene
industrial
industry
infected
infection
kn95
machinery
manufacture
manufacturing
mask
medical
medicine
non
outbreak
pandemic
plant
pollution
processing
production
protection
protective
respirator
respiratory
robotic
roll
safety
sick
supply
surgery
technology
virus
welding
work
woven