機器
background
blue
chips
closeup
copper
curly
cutting
discarded
drilling
ecology
engineering
environment
fabrication
filings
garbage
gray
heavy
industrial
industry
iron
lathe
machinery
manufacture
material
messy
metal
milling
pile
production
recycle
recycling
rip
rubbish
scrap
sharp
shaving
shavings
shiny
silver
spiral
steel
swarf
technical
technology
texture
trash
waste
white