機器
abstract
background
blue
chip
closeup
curly
cutting
engineering
environment
environmental
fabrication
filings
garbage
gray
heap
heavy
industrial
industry
iron
junk
lathe
manufacture
manufacturing
material
metal
metallic
metalwork
milling
pile
production
recycle
recycling
rip
rubbish
scrap
sharp
shave
shaving
shiny
silver
spiral
steel
swarf
technical
technology
texture
trash
waste
white