機器
alloy
aluminum
automotive
background
body
carbon
chrome
closeup
component
construction
detail
engine
engineering
equipment
facility
factory
fasten
flange
gear
industry
iron
joint
macro
manufacture
manufacturing
mechanic
mechanical
mechanism
metal
metallic
motor
new
nobody
part
screw
screwed
silver
spare
stainless
steel
store
technical
technology
tool
transportation
tube
valve
work
workshop