機器
adjusting
background
bolt
chrome
closeup
component
construction
engineering
equipment
fasten
fastener
fastening
fix
frame
hardware
head
hexagon
improvement
industrial
industry
iron
macro
maintenance
manufacturing
many
mechanic
metal
metallic
nut
part
repair
repairing
screw
shiny
silver
stainless
steel
technology
texture
thread
threaded
threading
tighten
tool
tools
white
work
workshop
wrench