機器
assembly
blue
chemical
construction
couplings
crude
distillery
electricity
energy
engineering
equipment
expensive casing
extruder
factory
fuel
gas
heavy
hot
huge
industrial
industry
iron
machinery
manufacture
massive
metal
modern
night
oil
part
petrochemical
petroleum
pipe
pipeline
plant
pollution
power
production
refinery
station
steel
supply
technology
tube
tubing
urban
water
welding
work