機器
abandoned
background
black
blast
brick
building
business
chimney
coal
construction
ecology
exploding
factory
foundry
fumes
furnace
global
heavy
industrial
industrial building
industry
iron
loading
major
manufacturing
metal
metallurgy
old
ore
pipe
pollution
production
reservoir
river
rust
rusty
scented
sky
steel
tank
tool
unpleasant
wall
warehouse
warming
water
workplace
workshop