機器
abstract
accessory
background
bolt
chrome
closeup
concept
construction
design
engineering
equipment
fasten
fastener
fix
groove
group
hardware
industrial
industry
iron
macro
many
mechanic
metal
metallic
nobody
object
pattern
reflection
repair
screw
shiny
silver
small
stainless
steel
technology
texture
threads
tighten
tool
wallpaper
work
workshop
wrench