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
boring
hole
garbage
lathe
metalworking
machinery
machining
gray
industrial
fabrication
industry
workshop
machine
heavy
iron
environment