機器
aluminum
background
bit
bore
closeup
cutting
depth
discarded
drill
drilling
engineering
environment
fabrication
filings
garbage
gray
heap
heavy
industrial
industry
junk
lathe
macro
manufacture
material
messy
metal
mill
milling
pile
production
recycling
rubbish
scrap
sharp
shave
shiny
silver
spiral
stainless
steel
storage
technical
texture
trash
turnings
waste
white
work