機器
aluminium
automated
background
bar
bolt
closeup
cnc
cut
cutter
detail
dof
engineering
equipment
heavy
industrial
industry
iron
lathe
machining
macro
manufacture
manufacturing
material
mechanical
metal
metallic
metalwork
metalworking
pinion
process
production
rod
round
screw
shiny
spiral
stainless
steel
technology
texture
thread
threaded
threading
tool
turning
twisted
work