機器
alloy
automotive
background
ball
block
bolt
brass
business
carbon
closed
closeups
coated
concepts
connection
elements
engine
engineering
equipment
fasteners
fitting
globe
handle
heavy
industry
iron
macro
manufacturing
marine
metal
metallic
nobody
nut
oil
part
petrochemical
power
refinery
screw
screwed
shiny
silver
solid
stainless
steel
technology
thread
valve
welded