機器
assembly
background
bolt
chrome
close
close up
closeup
collection
construction
detail
engineering
equipment
grey
grunge
hardware
hexagon
horizontal
industrial
industry
iron
machinery
macro
maintenance
material
mechanic
mechanical
metal
metallic
nut
object
old
repair
rust
rusty
screw
set
shiny
silver
stainless
steel
thread
tool
white
work