英文關鍵字
chimney
condensate
cool
cooling
cylindrical
ecology
electricity
energy
engineering
environment
environmental
equipment
factory
forest
generate
generator
green
grass
great
heat
industrial
industry
lines
main
many
modern
network
plant
pole
pollution
power
service
sky
smoke
source
station
steel
structure
sun
sunset
supply
system
technical
technology
transmission
tree
vapor
voltage
warming
water