機器
aqueduct
california
conduit
cylinders
delivering
delivery
desert
duct
energy
engineering
equipment
fossil
fuel
fueling
gas
gasmain
gaspipe
hydropower
industrial
industry
line
main
metal
mojave
oil
park
petrol
petroleum
pipe
pipeline
pipes
piping
plumbing
power
pressure
pump
resources
steel
supply
system
technology
transmission
transportation
tubes
turn
valve
water
water pump