attention
barrel
bio
business
busy
chemicals
dangerous
dealing
engineer
equipment
factory
filling
fuel
gas
gear
gloves
glow
hazard
hazardous
industrial
industry
job
man
mask
mid adult
occupation
oil
procedure
production
professional
protective
recycling
risk
rubber
safe
safety
science
skilled
specialist
substance
tank
tech
technician
toxic
uniform
waste
wear
work
worker
yellow