英文關鍵字
blue
chemical
commercial
conduit
duct
electricity
energy
engineering
equipment
field
fossil
fuel
gas
gasoline
generation
heat
huge
hydropower
industrial
iron
line
loopable
metal
oil
oilfield
petrol
petroleum
pipe
pipeline
piping
pollution
power
production
refinery
rig
row
steel
sunset
supply
technology
transport
tube
tubing
water