機器
aged
broken
business
byroad
car
clouds
color
colorful
damaged
danger
destroyed
destruct
dropping
dung
dustbin
ecology
engineering
environment
equipment
factory
fertilizer
garbage
industry
iron
junk
machinery
mechanic
mechanism
metal
old
plate
plumbing
pollution
power
recycle
recycling
rust
rusted
rusty
shed metal
sheet metal
sky
steel
to repair
trash
waste
worn