accuracy
apparatus
black and white
circular
closeup
cogwheel
conical
connection
dimensional
engine
engineering
equipment
gear
gearing
heavy
heavy industrial
industrial
industry
interlocked
iron
mechanical
mechanics
metallic
motion
part
pinion
precision
shapes
shiny
spiral
steel
strength
teamwork
technology
teeth
togetherness
toned
tools
turn
turning
wheel
work