chemical
chemistry
connection
construction
consume
consumption
control
distribution
energy
engineering
environment
equipment
factory
fuel
gas
gasoline
gear
industrial
industry
instrument
measure
measurement
mechanical
metal
meter
natural
oil
petrochemical
pipe
pipeline
piping
plant
power
pressure
pressure gauge
production
pump
refinery
steam
steel
structure
system
tank
technology
tube
valve
warm
yellow