機器
architecture
big
building
business
cold
construction
control
distribution
electric
engine
equipment
factory
gas
heat
high
hot
indoors
industrial
industry
infrastructure
installation
insulation
interior
line
machinery
metal
modern
new
oil
pipe
piping
plant
power
pressure
pump
room
sewer
station
steel
structure
system
technology
treatment
tube
utility
valve
water
work