air
argon
cap
capped
care
cfr
chain
chained
chemical
code
compressed
container
cylinder
danger
dangerous
dot
equipment
factory
federal
fire
flammable
fuel
gas
gauge
hospital
industrial
industry
inspection
manufacturing
medical
osha
oxygen
plant
power
pressure
production
protection
regulation
regulator
requirement
rope
safety
secure
storage
tank
use
valve
verticle
welding
workplace