機器
assorted
background
bolt
chrome
chromed
close
closeup
cnc
component
construction
design
detail
element
engineering
equipment
fasten
fastener
fix
hardware
hexagon
indoor
industrial
industry
iron
lathe
machinery
machining
macro
many
mechanic
metal
nobody
nut
object
part
precision
repair
screw
set
shiny
stainless
steel
supplies
thread
threaded
tighten
tool
white
work