機器
alloy
background
bolt
bolthole
chrome
close
color
construction
dimensional
dimensionally
directly
equipment
fastener
fastening
fitter
hardware
head
hexagon
horizontal
image
industrial
industry
iron
isolated
locksmith
macro
material
mechanic
merchandise
metal
metallic
new
nut
object
reflection
screw
shape
shiny
silver
stainless
stationary
steel
store
technology
tool
up
white
work