機器
background
black
bucket
building
cartoon
construction
dark
dirty
drawing
equipment
factory
fiery
flame
foundry
garbage
hand
heat
heavy
hot
illustration
industrial
industry
iron
land
landscape
liquid
manufacturing
material
melting
metal
metallic
metalwork
mill
old
orange
paper
plant
pollution
production
rock
sparks
steel
technology
transportation
warehouse
waste
white
work
workshop