英文關鍵字
blue
business
chemical
conduit
construction
control
energy
engineering
environment
equipment
factory
field
fossil
fuel
gas
gasoline
industrial
industry
line
manufacturing
metal
natural
oil
petrochemical
petrol
petroleum
pipe
pipeline
piping
plant
pollution
power
pressure
processing
production
pump
red
refinery
resources
sky
station
steel
storage
supply
tank
technology
tube
valve
water
well