英文關鍵字
abstract
aluminum
background
chips
cnc
corrosion
curly
cut
cutting
cuttings
dump
dumped
environment
garbage
greasy
heap
industrial
industry
iron
junk
junkyard
lathe
machine
manufacturing
metal
metallic
oily
piece
pile
processed
production
recycle
recycling
rubbish
scrap
scrapyard
sharp
shaving
shavings
shining
silver
spiral
steel
swarf
technology
texture
trash
waste