金属産業
alloy
aluminum
aluminum mill
architecture and buildings
architecture backgrounds
arrangement
backdrop
background
backgrounds
black and white
blank
business
chrome
collection
construction
cross section
cylinder
dividing
equipment
extruded
freight transportation
group of objects
heap
industrial objects
industry
iron
line
manufacturing
material
merchandise
metal
molding
moulding
no people
outline
part of
pole
reflection
rod
shiny
silver
solid
stack
stainless steel
steel
steel mold
surface level
technology
technology abstract