broken
chemical
closing
consumption
control
corroded
corrosion
dirty
distribution
electricity
energy
engineering
equipment
factory
faucet
fuel
gas
gasoline
grunge
hand
heat
hydrant
industrial
industry
iron
metal
oil
old
petrol
pipe
pipeline
piping
plumb
plumbing
power
production
pump
rust
rusted
rusty
steel
stopcock
technology
tool
tube
tubing
valve
water