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