機器
architecture
boiler
building
business
chemical
chimney
concrete
construction
crane
dirty
drums
energy
environment
equipment
factory
fossil
grating
heavy
industrial
industry
ladder
machinery
manufacturing
material
petrochemical
pipework
plant
pollution
power
processing
produce
production
refinery
reflection
site
steel
storage
structure
support
technology
tower
tubes
turbine
work
workplace