機器
abstract
auto
bolts
canalization
chemistry
crank
crude
derivations
diesel
distillery
economy
energy
equipment
exploration
factory
flanges
fuel
gas
gasfield
gasline
gasoline
industrial
industry
iron
linkings
liquids
lubricant
mechanics
metal
oil
opec
petrochemical
petroleum
pipeline
pipes
piping
plant
power
pressurized
resources
steel
taps
technology
tower
transportation
turn
valves
wheel
work