英文關鍵字
metal
copper
press
plate
precision
production
recycling
scrap
sharp
shave
shiny
silver
steel
storage
technical
texture
trash
waste
pile
background
material
manufacture
center
closeup
cutting
cylinder
drilling
drills
engineering
work
industrial
environment
machinery
lathe
fabrication
gray
machine
hole
heavy
workshop
metalworking
iron
industry
garbage
machining
boring