英文關鍵字
3d
animation
background
building
chemical
chimney
city
coal
company
construction
cooling
danger
diesel
dirty
distillation
electricity
emblem
energy
engineering
environment
equipment
factory
figure
fuel
gasoline
generator
heat
heating
heavy
icon
illustration
industrial
industry
isolated
isometric
motion
pipe
plant
pollute
pollution
power
powerhouse
project
resources
smog
smoke
style
tower
voltage
white