英文關鍵字
nut
steel
object
metal
mechanic
isolated
industry
repair
tool
industrial
rotating
equipment
manufacture
background
engineering
white
construction
turn
closeup
work
service
shiny
spin
stainless
tight
silver
tools
part
rotate
mechanical
hardware
hex
strong
hexagon
threaded
technical
installation
chrome
fastener
new
fixing
iron
metallic
fix
diy