機器
assembly
auto parts
automobile
bolt
car
engine
environment
garage
garbage
gears
iron
junk
junk and pollution
junkyard
knot
metal
motor
nut
part
parts
pollution
recycle
remnant of iron
reusing
rubbish
rust
rusty
scrap
scrapyard
screw
screwdriver
spares
spares part
steel
surroundings
swarf
tool
used
used part
useless
washer