機器
aged
background
blast
building
casting
construction
creepy
dark
dirty
empty
equipment
factory
fire
flame
foundry
furnace
grunge
hall
heat
heavy
hot
industrial
industry
interior
iron
line
liquid
machinery
manufacture
manufacturing
melting
messy
metal
metallurgical
metallurgy
mill
molten
plant
power
production
red
smelting
steel
technology
work
workplace
workshop