機器
environmental
abstract
aluminum
background
broken
car
construction
crushed
dirty
discarded
disposal
dump
ecology
engineering
environment
filing
garbage
heap
heavy
industrial
industry
iron
junk
junkyard
landfill
machinery
manufacturing
material
messy
metal
metallic
old
outdoor
pile
pollution
production
recycle
recycling
rubbish
rust
rusted
scrap
shaving
stack
steel
texture
trash
waste
yard