機器
circle
cog
cog wheels
cogwheel
cogwheels
competition
components
connect
construct
construction
dovetail
engineer
engineering
equipment
gear
gear wheels
gears icon
industrial
industry
innovation
isolated
light circle gear
machinery
manufacturing
mechanic
mechanical
mechanism
merge
mesh
object
old mechanic tool
part
power
precision mechanics
ring gear
rotary
rotating
shape
spinning
sprocket
steam engine
structure
technique
technology
teeth
tool
transmission wheels