aluminum
アルミニウム
bolt
building
chrome
circle
closeup
connection
construction
design
engineering
equipment
fastener
flat
group
hardware
hole
industrial
industry
iron
isolated
macro
material
mechanic
mechanical
metal
metallic
nut
objects
old
part
pattern
pile
repair
ring
round
screw
set
shiny
silver
spacer
spring
stack
stainless
steel
tool
washer
washers
white
work