機器
alarm
background
building
business
business building
connection
construction
control
department
electricity
emergency
energy
engineer
engineering
equipment
factory
faucet
fire
fire control system
gauge
heat
industrial
industry
line
metal
pipe
pipeline
pipes
power
pressure
protection
pump
red
safety
security
sprinkler
station
steam
steel
supermarket
supply
system
systems
technology
tube
valve
valves
water
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