機器
background
building
connection
construction
control
drain
energy
engineering
equipment
factory
faucet
flow
gas
gasoline
hydrant
indian
industrial
industry
iron
line
maintenance
man
metal
oil
pipe
pipeline
piping
plumber
plumbing
power
pressure
professional
pump
repair
safety
service
service repair
station
steel
supply
system
tap
technology
tube
valve
valves
wall
water
water pump
定額
Young asian engineer working at valve water pump checking and maintenance for the safety. Worker control the system water of the building.の素材 [FY310228025104]
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