acetylene
automotive
bottle
canister
carbon
cartoon
caution
character
compressed
container
cute
cylinder
danger
dangerous
drum
emoticon
emotion
equipment
explosive
expression
fuel
funny
gas
happy
heating
house
icon
illustration
improvement
industry
liquefied
lpg
mascot
mechanic
mechanical
methane
oil
oil drum
propane
refill
repair
repairman
smile
storage
tank
technician
tools
workman
wrench