機器
antique
chemical
connection
construction
control
energy
engineering
environment
equipment
facility
factory
faucet
flow
fuel
gas
gasoline
generator
hydrant
industrial
industry
manufacturing
metal
oil
old
petrochemical
petroleum
pipe
pipeline
plant
pollution
power
pressure
production
pump
red
refinery
stainless
station
steel
supply
system
tap
technology
tube
turbine
valve
water
wheel