機器
background
bolt
bolts
chrome
close
closeup
construction
engineering
equipment
fastener
fasteners
gray
grey
hardware
head
hexagon
image
industrial
industry
iron
isolated
long
macro
material
mechanic
metal
metallic
nut
nuts
object
old
part
reflection
repair
screw
shape
shiny
silver
single
small
stainless
steel
thread
tool
tools
up
white
work