機器
apparatus
background
close
close up
closeup
complex
design
dimensional
engine
engineering
equipment
factory
gear
gears
industrial
industry
machineparts
machinery
mechanic
mechanical
mechanics
mechanism
metal
metallic
metalworks
parts
power
precision
quality
railway
reflecting
shape
shapes
steel
steelworks
strength
structure
technical
technology
titanium
tools
tube
up
wheel
work