英文關鍵字
appliance
black
blue
burner
butane
circle
close
contract
control
danger
dark
domestic
economy
energy
equipment
finance
fire
flame
food
fossil
fuel
gas
gasoline
generation
glow
heat
home
horizontal
hot
illuminated
indoors
industry
kitchen
metal
money
natural
oven
people
power
price
propane
residential
safety
stove
temperature
value
warm