機器
aluminum
background
bolt
bottle
broken
damage
dirty
disposal
dump
ecology
environment
environmental
garbage
hardware
heap
industrial
industry
iron
junk
junkyard
landfill
lot
macro
mass
mechanical
metal
metallic
nut
object
old
pile
pollution
processing
recycle
recycling
refuse
reuse
rubbish
rust
scrap
scrap metal
screw
steel
street
things
tip
trash
urban
waste