balloon
barrel
black
bottle
butane
canister
chemical
color
compressed
container
cooking
cylinders
design
energy
filling
flammable
flat
fuel
gas
graphic
green
house
icons
illustration
industrial
industry
isolated
line
linear
liquefied
liquid
lpg
outline
oxygen
pipe
power
pressure
propane
pump
refill
set
shale
steel
storage
tank
tanker
thin
truck
valve