英文關鍵字
business
chemical
conduit
construction
crude
energy
engineering
environment
equipment
factory
field
fossil
fuel
gas
gasoline
generation
industrial
industry
line
machine
metal
mining
natural
oil
oilfield
petrochemical
petrol
petroleum
pipe
pipeline
plant
pollution
power
production
refinery
rig
sky
steel
supply
tank
technology
tower
tube
valve
water
well
work
worker