accident
background
barrel
beware
biohazard
chemical
chemistry
contaminate
corrosive
crude
damage
dirt
discharge
drum
emergency
energy
environment
first
flammable
fluid
fuel
gallon
gas
hazard
hazardous
icon
industrial
label
leak
liquid
oil
petrol
petroleum
pollution
protection
risk
safety
set
sign
spill
sticker
storage
substance
symbol
tank
toxic
trash
warning poison
waste
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