機器
assembly
black
change
cog
cogwheel
component
design
different
direction
engineering
gear
gearing
gearwheel
generate
industrial
industry
interlock
isolated
machinery
mechanical
mechanism
mesh
metal
motion
motor
motorized
movement
object
on white
part
power
precise
precision
ratio
round
sizes
speed
steel
teeth
three
toothed
toy
transmit
turn
wheel
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