機器
boiler
closed
colors
control
danger
electric
electricity
energy
equipment
factory
gas
habitat
heat
heater
hot
industrial
industry
interior
iron
machinery
measuring
metal
modern
needle
pack
pipelines
pipes
plant
plastic
power
pressure
production
pumps
refinery
rust
screws
stainless
steam
steel
technology
tiles
value
valves
warm
water
watermark
wheels
wiring
work